Change workflow according to selected field.

[Sampath_Jayaweera]

Cannot change sub categories according to selection from previos.

[Nic Brough -Adaptavist-]

I do not understand the question, it actually looks like two unrelated things, and neither is clear.  I'll try to explain, to hopefully help you give us a bit more detail:

>Change workflow according to selected field

Workflows are determined by the project and issue type, not fields.   Do you mean you would like to determine the issue type by a field, or do you mean you want the workflow to do different things depending on the content of a field?

>Cannot change sub categories according to selection from previos.

What is a "sub category" in this one?  And what "selection from previous"?  And what exactly are you trying to do with the sub-category