For -901 always call support. They are internal error-messages you should
never see.
When calling support ask them to open an APAR straight against me.
I will need a reproducible script (with all dependent DDL).
In your sqllib/db2dump directory should be one or more files of the form:
t.000
Can you send it to me by mail: srielau@ca.ibm.com (gives me headstart :-)?
Cheers
Serge