Hi,
you can check the TSM return-codes in the header file (if installed on your box).
The file ist name dsmrc.h
#define DSM_RC_INVALID_OPT 400 /* invalid option */
The keyword OPTIONS is missing in your Backup-Command:
... use tsm OPTIONS "TSM_MGMTCLASS=MCDWH01" ....
In the Options you have to specify the Options from TSM and not from DB2, so TSM_MGMTCLASS might not be the correct keyword. Check the from TSM.
Cheers
nvk