Diagnosis
Retroactive accounting has not been de-activated for Infotypes 0461,
0462, 0463 and/or 0464.

System Response
During a Production run, the Conversion program will stop processing
while retroactive accounting is active for the Tax Framework Infotypes.
Without this check, the Infotype 0003 field "'Earliest Change in Master
Data Since Last Payroll' would be set to the Begin Date of the
earliest Tax Framework Infotype created. Such a setting would trigger
a retro-active Payroll Run back this date for every employee converted.
To avoid this, the retroactive accouting switch for the Tax Framework
Infotypes should be deactivated during conversion.

Procedure
Deactivate retroactive accounting for the Tax Framework Infotypes
before running the Conversion report in Production mode.
Field RUREC ("Retroactive accounting relevance for payroll")
in Table T582A must set to value blank for Infotypes 0461, 0462, 0463
and 0464. Use transaction SM30, view "V_582A_D" to set these values.
Once conversion is complete, return this value to its original setting.
(Value 'R' - "Change triggers retroactive accounting"
or 'T' - "Retro accounting is field-dependent according to T588G".)