Description of problem:

If you set "variable name" in the multi-instance sub process, which is the variable which will store element of the current iteration, it is not possible to use this variable name in the Assignment section.

Version-Release number of selected component (if applicable):
6.0.2

How reproducible:
always

Steps to Reproduce:
1. Create process which includes multi-instance sub process
2. Set "variable name" of this multi-instance sub process
3. Model Human Task or Service Task within this multi-instance sub process
4. Try to perform an assignment of the variable name you have just set to the input of the newly modeled task - not possible, the value is simply not being displayed.

==== use attached git repository ===

• import repository
• open Parent project
• check the "variable name" of the multi-instance sub process
• try to assign this variable in the reusable sub process, which is modeled within the multi-instance sub process - it is not possible. It is not related to reusable sub process only, there can be whatever task which has Assignments section - human task, service task

Actual results:
Variable name of multi-instance sub process is not being displayed in the Assignments editor of the tasks modeled within this multi-instance sub process.

Expected results:
Variable name of multi-instance sub process is being displayed in the Assignments editor of the tasks modeled within this multi-instance sub process.

Additional info:
The workaround is to create PROCESS with the same name as the multi-instance subprocess "variable name", then perform the mapping, then delete the process variable.