GEN_INHERITANCE_LOOP is an ABAP runtime error which you may come across when using or developing within an SAP system. See below for the standard details explaining what it means and how you can avoid or fix this runtime error.
Short Dump Classification: I - Internal Kernel Error
You can view further information about a runtme error by using transaction code ST22 which will show you this and all runtime erros that have happen in your SAP system.
Also check out the Comments section below to view or add related contributions and example screen shots.
Please see internal gen error for more details about the possible cause of this runtime error and how it could be avoided.
Cyclical inheritance occurred during generation.
Please see internal error for more details about the possible cause of this runtime error and how it could be avoided.
During generation, cyclical inheritance was detected.
Since such relationship should already be prevented
by the syntax check or the Workbench, it is probably
an internal error.
Please see internal gen error for more details about the possible cause of this runtime error and how it could be avoided.