Hi Sam,
I have also similar issue and raised it to SAP. I got below reply from SAP.
I have check the problem with the "More interval for depreciation
paramters" in the system AEP/900.
1. You have different support package for SAP_APLL and EA-APPL.
2, You have old support package for SAP_APLL and EA-APPL.
Support package:
SAPKH60408 SP 08 for SAP_APPL 604 Imported on 27.03.2011 at 15:16:11
SAPKGPAD15 SP 15 for EA-APPL 6.00 Imported on 18.02.2009 at 09:16:16
The support package for SAP_APPL and EA-APPL must not be different.
You must import the current support package for SAP_APPL and EA-APPL.
However, to resolve it we need to upgrade the system. You can check the above settings in your system.
Regards,
Mukthar