# UML **URL:** https://forums.visual-paradigm.com/c/uml/5.md?page=2 [Latest](https://forums.visual-paradigm.com/latest.md) · [Categories](https://forums.visual-paradigm.com/categories.md) · [Tags](https://forums.visual-paradigm.com/tags.md) **Page:** 3 --- ## [Shortcomings of C++ round trip engineering](https://forums.visual-paradigm.com/t/shortcomings-of-c-round-trip-engineering/16760)
**Author:** [@emmenlau](https://forums.visual-paradigm.com/u/emmenlau)\ **Replies:** 15\ **Last updated:** [January 24, 2022, 3:26am UTC](https://forums.visual-paradigm.com/t/shortcomings-of-c-round-trip-engineering/16760 "2022-01-24T03:26:26Z")
I found VP quite helpful for creating UML diagrams. But sadly the C++ round trip engineering seems very limited. After two or three iterations of round trip engineering it typically fails for us and leaves the diagram an… --- ## [Activity accross swimlanes](https://forums.visual-paradigm.com/t/activity-accross-swimlanes/16128)
**Author:** [@jedepaepe](https://forums.visual-paradigm.com/u/jedepaepe)\ **Replies:** 3\ **Last updated:** [January 24, 2022, 1:52am UTC](https://forums.visual-paradigm.com/t/activity-accross-swimlanes/16128 "2022-01-24T01:52:28Z")
Hi, In activities diagrams, can I draw an activity over two or more swimlanes? Thanks, Yours, --- ## [How to generate children methods from abstract classes?](https://forums.visual-paradigm.com/t/how-to-generate-children-methods-from-abstract-classes/17367)
**Author:** [@Aurelien\_BOUDIER](https://forums.visual-paradigm.com/u/Aurelien_BOUDIER)\ **Replies:** 1\ **Last updated:** [January 18, 2022, 9:36am UTC](https://forums.visual-paradigm.com/t/how-to-generate-children-methods-from-abstract-classes/17367 "2022-01-18T09:36:13Z")
Hi, I’m using the last version of VP. I wanted to know if there is a way (once you wrote abstract methods in abstract classes) to “automatically” write this methods in children concrete classes ? Thanks. --- ## [Sequential Diagram to Collaborative Diagram](https://forums.visual-paradigm.com/t/sequential-diagram-to-collaborative-diagram/17350)
**Author:** [@A\_Tiger-Shark](https://forums.visual-paradigm.com/u/A_Tiger-Shark)\ **Replies:** 1\ **Last updated:** [January 12, 2022, 10:52am UTC](https://forums.visual-paradigm.com/t/sequential-diagram-to-collaborative-diagram/17350 "2022-01-12T10:52:33Z")
Everything on this topic is at least 11 years old based on my searches. I right click the background, but there is nothing in the context menu on converting my Sequential Diagrams into Collaborative ones. Does anyone kno… --- ## [Instant Reverse on MacOS](https://forums.visual-paradigm.com/t/instant-reverse-on-macos/17326)
**Author:** [@Carlos\_M](https://forums.visual-paradigm.com/u/Carlos_M)\ **Replies:** 3\ **Last updated:** [January 7, 2022, 7:53am UTC](https://forums.visual-paradigm.com/t/instant-reverse-on-macos/17326 "2022-01-07T07:53:22Z")
Hello - I’ve got VP Enterprise Trial version on my MacOS and am trying to reverse engineer a C# codebase. I tried using Instant Reverse, but get this error: Reason : Output file from parsing source code does not exist… --- ## [Actor, named user , uses the system after each year to collect certificate( use case ) , does this require a new use case diagram?](https://forums.visual-paradigm.com/t/actor-named-user-uses-the-system-after-each-year-to-collect-certificate-use-case-does-this-require-a-new-use-case-diagram/17315)
**Author:** [@ash14](https://forums.visual-paradigm.com/u/ash14)\ **Replies:** 2\ **Last updated:** [December 26, 2021, 8:57pm UTC](https://forums.visual-paradigm.com/t/actor-named-user-uses-the-system-after-each-year-to-collect-certificate-use-case-does-this-require-a-new-use-case-diagram/17315 "2021-12-26T20:57:15Z")
I already have a use case diagram that represents the administration system with actors including students,lecturers and student admin.However there is another actor named user that uses this system at the end of every y… --- ## [Why not all class has a connection?](https://forums.visual-paradigm.com/t/why-not-all-class-has-a-connection/17101)
**Author:** [@osion](https://forums.visual-paradigm.com/u/osion)\ **Replies:** 4\ **Last updated:** [December 20, 2021, 1:34am UTC](https://forums.visual-paradigm.com/t/why-not-all-class-has-a-connection/17101 "2021-12-20T01:34:56Z")
Hello I upload all my class but when I used in visual paragim not all class has a connection like main or ErrorMessage. How can I show all connections? I am very new with this software. --- ## [How to set up a default class behavior and add ownedBehaviors](https://forums.visual-paradigm.com/t/how-to-set-up-a-default-class-behavior-and-add-ownedbehaviors/17012)
**Author:** [@pauldab](https://forums.visual-paradigm.com/u/pauldab)\ **Replies:** 3\ **Last updated:** [December 6, 2021, 11:08am UTC](https://forums.visual-paradigm.com/t/how-to-set-up-a-default-class-behavior-and-add-ownedbehaviors/17012 "2021-12-06T11:08:28Z")
Hi, I would like to set a default behavior of a class model element. Generally I would like to create this behavior for my Block element in SysML, but for the sake of initial discussion I want to use it for UML. Unfortu… --- ## [SysML: cannot add block as a parameter of an operation](https://forums.visual-paradigm.com/t/sysml-cannot-add-block-as-a-parameter-of-an-operation/17135)
**Author:** [@Zsolt\_Sandor](https://forums.visual-paradigm.com/u/Zsolt_Sandor)\ **Replies:** 2\ **Last updated:** [November 30, 2021, 10:03am UTC](https://forums.visual-paradigm.com/t/sysml-cannot-add-block-as-a-parameter-of-an-operation/17135 "2021-11-30T10:03:56Z")
Create two SysML blocks A and B. Add an operation to A (like myOperation). Try to choose the B either as a return type, or as a type of the parameter in the dropdown (not possible). Create a new class (C) in the model… --- ## [Cannot directly create a diagram into a package](https://forums.visual-paradigm.com/t/cannot-directly-create-a-diagram-into-a-package/17133)
**Author:** [@Zsolt\_Sandor](https://forums.visual-paradigm.com/u/Zsolt_Sandor)\ **Replies:** 2\ **Last updated:** [November 30, 2021, 8:53am UTC](https://forums.visual-paradigm.com/t/cannot-directly-create-a-diagram-into-a-package/17133 "2021-11-30T08:53:47Z")
When creating a new diagram, I am unable to create a diagram directly into a package. What I could do is create the diagram, then select it in the diagram navigator, and open specification, and change parent model. As … --- ## [How to depict possible limiting factor/instances in class diagrams?](https://forums.visual-paradigm.com/t/how-to-depict-possible-limiting-factor-instances-in-class-diagrams/17115)
**Author:** [@Evie](https://forums.visual-paradigm.com/u/Evie)\ **Replies:** 1\ **Last updated:** [November 19, 2021, 9:27am UTC](https://forums.visual-paradigm.com/t/how-to-depict-possible-limiting-factor-instances-in-class-diagrams/17115 "2021-11-19T09:27:21Z")
Hi! I’ve recently started a comp sci program, and my study group and I are doing one of the intro courses on object oriented programming. One of our current tasks involves making a class diagram for a shirt printing bus… --- ## [ identification class](https://forums.visual-paradigm.com/t/identification-class/17105)
**Author:** [@SmallNet](https://forums.visual-paradigm.com/u/SmallNet)\ **Replies:** 1\ **Last updated:** [November 15, 2021, 4:02am UTC](https://forums.visual-paradigm.com/t/identification-class/17105 "2021-11-15T04:02:25Z")
How to draw the identification class? Recognition class is control class, entity class and boundary class. Ha ha, it’s a circle. --- ## [Code Generation from Class Diagram: Composition between two classes does not change anything in generated Java code!](https://forums.visual-paradigm.com/t/code-generation-from-class-diagram-composition-between-two-classes-does-not-change-anything-in-generated-java-code/17061)
**Author:** [@VP41](https://forums.visual-paradigm.com/u/VP41)\ **Replies:** 1\ **Last updated:** [October 11, 2021, 2:02am UTC](https://forums.visual-paradigm.com/t/code-generation-from-class-diagram-composition-between-two-classes-does-not-change-anything-in-generated-java-code/17061 "2021-10-11T02:02:10Z")
I created two simple classes A and B, such that there there a COMPOSITION between these two classes. However, the generated code (in Java) is the same with OR without the composition between these two classes. In other w… --- ## [CallOperation action and referenced projects](https://forums.visual-paradigm.com/t/calloperation-action-and-referenced-projects/17016)
**Author:** [@arturK](https://forums.visual-paradigm.com/u/arturK)\ **Replies:** 3\ **Last updated:** [September 14, 2021, 1:45am UTC](https://forums.visual-paradigm.com/t/calloperation-action-and-referenced-projects/17016 "2021-09-14T01:45:52Z")
Hi, I am trying to use operation from referenced project in CallOperation action without any success. It looks like it is not supported. May I ask to confirm the fact nor send instruction how to access referenced model … --- ## [Can not type Chinese in the Basic flow chart](https://forums.visual-paradigm.com/t/can-not-type-chinese-in-the-basic-flow-chart/15526)
**Author:** [@Liao\_Ruochen](https://forums.visual-paradigm.com/u/Liao_Ruochen)\ **Replies:** 4\ **Last updated:** [September 9, 2021, 5:13am UTC](https://forums.visual-paradigm.com/t/can-not-type-chinese-in-the-basic-flow-chart/15526 "2021-09-09T05:13:34Z")
I install the visual paradigm on mac pro. In the basic flow char, I can not type Chinese. Please help fix the bug. --- ## [Linking actions and activities](https://forums.visual-paradigm.com/t/linking-actions-and-activities/17001)
**Author:** [@KDean](https://forums.visual-paradigm.com/u/KDean)\ **Replies:** 2\ **Last updated:** [August 31, 2021, 12:43pm UTC](https://forums.visual-paradigm.com/t/linking-actions-and-activities/17001 "2021-08-31T12:43:17Z")
I can create an Action with input and output pins and then right-click, select “Behaviour”, and then “Create Activity”, which generates a skeleton with input and output parameters. All of this is per the tutorial at How … --- ## [How to add OpaqueAction in VP?](https://forums.visual-paradigm.com/t/how-to-add-opaqueaction-in-vp/16984)
**Author:** [@pauldab](https://forums.visual-paradigm.com/u/pauldab)\ **Replies:** 1\ **Last updated:** [August 24, 2021, 3:32am UTC](https://forums.visual-paradigm.com/t/how-to-add-opaqueaction-in-vp/16984 "2021-08-24T03:32:52Z")
Hi, How to add OpaqueAction in VP i.a.w. UML spec: Best, Paweł --- ## [Why shortcut doesn't work](https://forums.visual-paradigm.com/t/why-shortcut-doesnt-work/16974)
**Author:** [@meixuesong](https://forums.visual-paradigm.com/u/meixuesong)\ **Replies:** 5\ **Last updated:** [August 23, 2021, 12:51am UTC](https://forums.visual-paradigm.com/t/why-shortcut-doesnt-work/16974 "2021-08-23T00:51:13Z")
Why the shortcut doesn’t work sometimes. I’m using VisualParadigm 16.3, mac bigsur. I found sometimes new attributes(option+shift+A) doesn’t work. and after reboot the app, it will work again. but you don’t know when it… --- ## [REST Service parameters specifications not appearing on published documentation](https://forums.visual-paradigm.com/t/rest-service-parameters-specifications-not-appearing-on-published-documentation/16868)
**Author:** [@Paulo\_Cerqueira](https://forums.visual-paradigm.com/u/Paulo_Cerqueira)\ **Replies:** 4\ **Last updated:** [June 28, 2021, 10:49am UTC](https://forums.visual-paradigm.com/t/rest-service-parameters-specifications-not-appearing-on-published-documentation/16868 "2021-06-28T10:49:12Z")
Hi, I dont know if im missing on something, but i cannot find a way to present the parameters specifications from the REST Service model on the published documentation: Could you guys give me some light? Thanks for… --- ## [Class diagram keeps deleted models causing failures](https://forums.visual-paradigm.com/t/class-diagram-keeps-deleted-models-causing-failures/16862)
**Author:** [@LibAdri](https://forums.visual-paradigm.com/u/LibAdri)\ **Replies:** 2\ **Last updated:** [June 14, 2021, 11:32am UTC](https://forums.visual-paradigm.com/t/class-diagram-keeps-deleted-models-causing-failures/16862 "2021-06-14T11:32:06Z")
Class diagram continues to keep trace of deleted models (in my case REST APIs). There is no trace of the deleted objects in the diagram navigation tree, but in the specifications of the diagram they continue to be liste… --- ## [Component Diagram vs Structure Composite Diagarm](https://forums.visual-paradigm.com/t/component-diagram-vs-structure-composite-diagarm/10625)
**Author:** [@safar](https://forums.visual-paradigm.com/u/safar)\ **Replies:** 3\ **Last updated:** [May 20, 2021, 12:49am UTC](https://forums.visual-paradigm.com/t/component-diagram-vs-structure-composite-diagarm/10625 "2021-05-20T00:49:42Z")
--- ## [Looking - UML testing , experience in Visual Paradigm at Pune](https://forums.visual-paradigm.com/t/looking-uml-testing-experience-in-visual-paradigm-at-pune/16802)
**Author:** [@sonali\_ambilapure](https://forums.visual-paradigm.com/u/sonali_ambilapure)\ **Replies:** 1\ **Last updated:** [May 11, 2021, 12:01pm UTC](https://forums.visual-paradigm.com/t/looking-uml-testing-experience-in-visual-paradigm-at-pune/16802 "2021-05-11T12:01:27Z")
Looking for UML Testing Candidate with Visual Paradigm experience Experience - 5-8yrs Location - Pune JD - Test planning , UML testing , experience in Visual Paradigm Please share profiles on sonali\_ambilapure@onwa… --- ## [How to model functions in an object or a class diagram](https://forums.visual-paradigm.com/t/how-to-model-functions-in-an-object-or-a-class-diagram/16788)
**Author:** [@MahmoudFouda](https://forums.visual-paradigm.com/u/MahmoudFouda)\ **Replies:** 1\ **Last updated:** [May 2, 2021, 8:55am UTC](https://forums.visual-paradigm.com/t/how-to-model-functions-in-an-object-or-a-class-diagram/16788 "2021-05-02T08:55:44Z")
Hi, I would like to know how Can I model a function in an object diagram. In the diagram I have classes, instances and there are some helper functions that will do some operations on these instances. I could not find a… --- ## [Struct attribute in a class diagram](https://forums.visual-paradigm.com/t/struct-attribute-in-a-class-diagram/16758)
**Author:** [@kalpak](https://forums.visual-paradigm.com/u/kalpak)\ **Replies:** 1\ **Last updated:** [April 21, 2021, 2:06am UTC](https://forums.visual-paradigm.com/t/struct-attribute-in-a-class-diagram/16758 "2021-04-21T02:06:06Z")
Hi, How do I add a struct attribute (variable) in a class diagram? thanks, Kalpak --- ## [Generating C# code from class activity diagram](https://forums.visual-paradigm.com/t/generating-c-code-from-class-activity-diagram/16755)
**Author:** [@kalpak](https://forums.visual-paradigm.com/u/kalpak)\ **Replies:** 4\ **Last updated:** [April 20, 2021, 8:06am UTC](https://forums.visual-paradigm.com/t/generating-c-code-from-class-activity-diagram/16755 "2021-04-20T08:06:12Z")
I created a class. Added an attribute and an operation. For the operation added an activity diagram. But the instant code generator creates only exception code for the activity diagram. public void Increment\_asd() { … --- ## [I created a project that targets C#, How to add multi Dimensional Array attributes in class diagram?](https://forums.visual-paradigm.com/t/i-created-a-project-that-targets-c-how-to-add-multi-dimensional-array-attributes-in-class-diagram/16749)
**Author:** [@goodluckrhj](https://forums.visual-paradigm.com/u/goodluckrhj)\ **Replies:** 0\ **Last updated:** [April 16, 2021, 6:38am UTC](https://forums.visual-paradigm.com/t/i-created-a-project-that-targets-c-how-to-add-multi-dimensional-array-attributes-in-class-diagram/16749 "2021-04-16T06:38:14Z")
I created a project that targets C#, How to add multi Dimensional Array attributes in class diagram? And how to specify enumeration literal value? --- ## [Instant generator : option to export the class diagram view?](https://forums.visual-paradigm.com/t/instant-generator-option-to-export-the-class-diagram-view/16723)
**Author:** [@mario.meuris](https://forums.visual-paradigm.com/u/mario.meuris)\ **Replies:** 1\ **Last updated:** [April 7, 2021, 8:35am UTC](https://forums.visual-paradigm.com/t/instant-generator-option-to-export-the-class-diagram-view/16723 "2021-04-07T08:35:32Z")
I’ve created a class diagram with the classes available in my class repository. Then I’ve hidden certain associations/attributes. Is it possible to export that view ? Taking into account what was hidden. Hidden items sho… --- ## [Where do I modify the properties of the Follow Diagram connector?](https://forums.visual-paradigm.com/t/where-do-i-modify-the-properties-of-the-follow-diagram-connector/16708)
**Author:** [@packerx](https://forums.visual-paradigm.com/u/packerx)\ **Replies:** 3\ **Last updated:** [April 7, 2021, 1:21am UTC](https://forums.visual-paradigm.com/t/where-do-i-modify-the-properties-of-the-follow-diagram-connector/16708 "2021-04-07T01:21:58Z")
The Follow Diagram connector strikes thru the text of the transition connector. How do I change it to not make it paint thru the label by default? --- ## [Class/Entities name collision](https://forums.visual-paradigm.com/t/class-entities-name-collision/16688)
**Author:** [@Jerzy\_Stachera](https://forums.visual-paradigm.com/u/Jerzy_Stachera)\ **Replies:** 1\ **Last updated:** [March 24, 2021, 1:07am UTC](https://forums.visual-paradigm.com/t/class-entities-name-collision/16688 "2021-03-24T01:07:28Z")
Hi. In single project i have few class diagrams, how to separate them on class name level. Since when I try to create class with the same name as it is in other class diagram then It shows me warning ‘change to aux view… --- ## [Why a class name must be specified in component diagram's interface?](https://forums.visual-paradigm.com/t/why-a-class-name-must-be-specified-in-component-diagrams-interface/16598)
**Author:** [@trypsin](https://forums.visual-paradigm.com/u/trypsin)\ **Replies:** 4\ **Last updated:** [February 17, 2021, 12:53pm UTC](https://forums.visual-paradigm.com/t/why-a-class-name-must-be-specified-in-component-diagrams-interface/16598 "2021-02-17T12:53:16Z")
here below is a illustration of relationship I want to show: component Planning provides some callbacks functions, which make Planning to do something. component Prediction requires the callbacks above, shall call thes… [Previous page](https://forums.visual-paradigm.com/c/uml/5.md?page=1) [Next page](https://forums.visual-paradigm.com/c/uml/5.md?page=3)