Auto populate assignment group on INC form based of subcategory and category fields

[DaniJ]

Hello,

I need some help with an onChange script. I am needing to auto populate an assignment group and application based of subcategory and category on an INC form. I have attempted to do this via business rules, onChange script but it seems to not be working. I had it at one point to assign the assignment group but it does not clear if a different category is selected. Any ideas are welcome.

Thank you 

Note: I have also tried assignment rules as well and that was not working. 

[Mehta]

You must first check for business rules that is populating the assignment group. It could be possible that a before business rule is running and overwritten what ever changes you have tried through assignment look up or through client script or other business rules. 

Apart from it, I would suggest you to use assignment rules , where you can define the conditions using condition builder.

[DaniJ]

Thank you but I have checked all the BR and I did not see anything that would cause the issue. I have also tried the assignment rules but that did not work. Not sure what it could be honestly this is why I was trying the last resort and the onChange script. Maybe I am not writing the script properly and was asking for a sample. I am still new to scripting so I may be missing something. 

[Mehta]

Can you share the script. I will try to help you on scripting part.