Payables Open Interface Import fails with Invalid Liability Account Error Message.

We are implementing 12.1.3 and have an issue (subject line). After much effort we find that the AP_IMPORT_VALIDATION_PKG is calling fnd_flex_keyval.validate_segs which is failing for all liability accounts. We have verified that the account type is "L" and that all code combinations have been created. If I execute the fnd_flex_keyval.validate_segs using same values as used in the Import I get a fail return code with the following error "GL_CTAX_DETAIL_POSTING". This error is one of the VRULE parameter which are hard coded in the fnd_flex_keyval.validate_segs API. Here's the VRULE parameter: <'GL_GLOBAL\nDETAIL_POSTING_ALLOWED\nI\nAPPL=SQLGL;'||  'NAME=GL_CTAX_DETAIL_POSTING\nY\0GL_GLOBAL\nSUMMARY_FLAG\nI\nAPPL=SQLGL;'|| 'NAME=GL_CTAX_SUMMARY_ACCOUNT\nN', >. If I run the fnd_flex_keyval.validate_segs substituting NULL for the