Hello All,
currently i am facing issue in my new BI 7.3 server when i try to execute planning sequence, i am getting the below error:

We have recently moved from 7.0 to 7.3 version very recently and when i try to execute the planning seq it raises above shown error but we have the same code in the BI 7.0 and nevere faced any issue while execution of Planning Sequence and we din't even changed the code.
we are using this Work area <WA_STATUS> in Customer exit and also in the Program.
It will be so helpfull if you let know why it is raising error and also wanted to check have any one faced simmilar issue in 7.3.
Thanks in Advance,
PJ.