After applying maintenance and starting Vantage STC, get msg:
VAN0007E SYSTEM PARAMETER nnnnnnn IS UNKNOWN - CHECK THE SPELLING. What is the problem?
This could be related to incorrect spelling, but could also be caused by an obsolete parameter in the VKGPARMS member.
In r12.6, see if this PTF is applied:
RO33634 VAN0007E ISSUED IF VANTAGE AND ALLOCATE USE SAME VKGPARMS MEMBER