SYSTEM_CLASS_NOT_FOUND 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: A - ABAP Programming 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.
Check the most recent transports to the SAP System.
Are changes currently being made to program <runtime parameter> or class <runtime parameter>?
Please see search hints for more details about the possible cause of this runtime error and how it could be avoided.
Please see send to sap for more details about the possible cause of this runtime error and how it could be avoided.
Class <runtime parameter> not found.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
An attempt was made to address class <runtime parameter>. The class definition (either
local in program <runtime parameter> or as a global class) that belongs to it does not
exist.
When starting transaction <runtime parameter>, class <runtime parameter> in ABAP program <runtime parameter> was
addresssed. No class definition was found for it however.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
SYSTEM_CLASS_NOT_FOUND - system class not found SYSTEM_CLASSCONSTRUCTOR_FAILED - system classconstructor failed SYSTEM_CANT_CLEAR - system cant clear SYSTEM_CANNOT_WRITE_TABLE - system cannot write table SYSTEM_CANNOT_READ_TABLE - system cannot read table SYSTEM_CANNOT_OPEN_TABLE - system cannot open table