INSTCHKTAB is a standard SAP Table which is used to store SAP Installation: Table for Check Routines for RRR data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The INSTCHKTAB table consists of various fields, each holding specific information or linking keys about SAP Installation: Table for Check Routines for RRR data available in SAP. These include FUNCNAME (Name of Function Module), CHKSORT (Numc3, internal use), ACT_FLAG (Single-Character Indicator), ALLOW_RC (Return Code)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .