STORE question


I encountered a problem, my program can not add new record into VSAM file.

I use STORE + filename to add record. I test my program in testing env, but when i run same program in production env, can not find the new record in VSAM, and there was no VSAM or NATURAL error message.
If necessary, I can post my source code.

Q1:This program happened after we upgrage NAT2 from 314 to 414, is it a system issue?
Q2: if there is VSAM error, will the program stop at once? there is no return code checking in my program.