GEN_TEXT_BUFFER_OVERFLOW 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.
If this is the case, try to shorten the structures.
If this is not the case or is not possible, you might be able to remove
the error by increasing the size of the relevant buffer. The size of
the buffer is set using the abap/rsyntxtln parameter in the rsparam
file. The current value set in this parameter is <runtime parameter> bytes.
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.
Text buffer overflow during generation.
Please see abap error for more details about the possible cause of this runtime error and how it could be avoided.
During generation, there was an overflow in the buffer for internally
created ABAP statements. The current size of this buffer is <runtime parameter> bytes.
This error might be due to a MOVE-CORRESPONDING statement for a
structure with a very large number of individual fields.
Please see internal gen error for more details about the possible cause of this runtime error and how it could be avoided.