Codesys compiler warning, cannot clear and would like to

[AlfredoQuintero]

Hello. I am trying to use the Codesys function FILE.DirOpen from the CAA File library. For the eError output parameter I declare a CAA.ERROR type variable, but the compiler shows the warning below.

Operand 'EDirOpenERR' (Impl)): C0327: Implicit conversion from one enumeration type (ERROR (caa file, 3.5.17.0 (caa technical workgroup))) to another (ERROR (caa types extern, 3.5.17.0 (caa technical workgroup)))

What would be the correct data type that I must use to clear this warning?

Thanks for any hint.

 

[ndzied1]

It seems like you have multiple libraries with a definition for CAA.ERROR in your project and you need to specify which one to use when you define your variables.

I seem to remember a question about this on the CoDeSys forum a while back. You can search or ask here:
https://forge.codesys.com/forge/talk/

 

[AustralIan]

You need a FILE.ERROR, right?

 

[AlfredoQuintero]

You need a FILE.ERROR, right?

Yes. I need to verify whether a particular folder exists

 

[AlfredoQuintero]

It seems like you have multiple libraries with a definition for CAA.ERROR in your project and you need to specify which one to use when you define your variables.

I seem to remember a question about this on the CoDeSys forum a while back. You can search or ask here:
https://forge.codesys.com/forge/talk/

Thanks very much for this hint. I have checked the CoDeSys forum but I cannot find the related post. The search capabilities for the forum seem not so good, certainly less capable than the search in plctalk.net. For example, nothing shows up if I search for "C0327" or " CAA.ERROR".
In the past I have had issues declaring variables of data types defined in specific libraries registered in the project, and the workaround I found is to add a prefix to the data type with the name of the library. I cannot figure out the prefix for the CAA File library. The documentation does not seem to explain how to fully qualify a data type. Or maybe it does but I am unable to find such explanation. Like I had to do for RTS_IEC_RESULT data types in below code. I wonder how I can do the same for CAA ERROR data type.

 

[AlfredoQuintero]

Compiler warning problem solved after worstation reboot

OK, AustralIan and ndzied1, the warning disappeared after I had to reboot the workstation in which I am developing this program. Go figure. So the program syntax was OK, but somehow the CoDeSys development environment was not correctly setup or updated. Sometimes when I add libraries to a project (or EDS files, GSDML files, etc.) it seems I need to reboot the CoDeSys development environment to fix compiler issues.

Thanks for the hints. Now I have realized that what I am trying to do may be much easier to achieve using CoDeSys persistence mechanisms. I may initiate another post regarding such functionality, which I have never used, in case I get stuck again.

 

[AustralIan]

Build errors are only shown after a build (F11).


I mean, I think you want a FILE.ERROR and not a CAA.ERROR.

 

[AlfredoQuintero]

AustralIan, as always you are right. With the FILE.ERROR data type the compiler warning disappears. The error is "wrong parameter" though. But if the directory exits there is no error and there is no compiler warning. Again and again, thanks for your patience. I would have expected:
NOT_EXIST | 5104 | Directory or file does not exist
As per table below:
https://product-help.schneider-elec.../core_CAALibraries/topics/file_error_enum.htm