Call method dynamic from classname

[Former Member]

Hey everybody, i need some help with a small feature. I want to check the actual installed version of a package. There are few systems and few different packages. The problem is i can't assume that all packages are on the system. So there are some systems with for example only one package. So i must search the packages dynamic. LV_PRODUCT_NAME is the classname of the class, which has the version information of the package. I can call the GET_VERSION method and i receive a string. RV_RELEASE_NOTE is my exporting parameter. The Problem now is that i fall constantly into the catch block. I tried a lot of things, but this is the best i had found:

METHOD get_release_notes .

DATA ls_methode   TYPE tmdir.

DATA lr_class     TYPE REF TO OBJECT.

DATA lv_error     TYPE REF TO CX_ROOT.

ls_methode-classname = IV_PRODUCT_NAME.

ls_methode-methodname = 'get_version'.

TRY.

   CREATE OBJECT lr_class TYPE (ls_methode-classname).

   CALL METHOD lr_class->(ls_methode-methodname)

     RECEIVING

     RT_Version = RV_RELEASE_Notes.

CATCH

     cx_sy_dyn_call_error INTO lv_error.

     RV_RELEASE_NOTES = ls_methode-classname.

ENDTRY.

ENDMETHOD.

[Former Member]

Ok, i have found my issue:

the methodname was writen in small letters

PS.: And for people who are interessted, the classname was is a String.

[Former Member]

I think it all looks fine... Not sure if this matters or not:

ls_methode-methodname = 'get_version'.

I think you might need to have the method name in all caps.

ls_methode-methodname = 'GET_VERSION'.