
GPs GL00102 table allows for up to 51 characters. Management Reporter 2012 CU12's datamart's AccountCategory table's [name] column allows for only 50 characters. This stalls the data mart GL Transaction to Fact task and results in string/binary truncation error.
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I have the same question (0)HI 26P2ER (?),
CU12 was not the most stable release of MR 2012.. I would strongly suggest to upgrade to CU14 at least.
The latest build CU15 has been release recently, but requires some other significant changes to your server (.NET upgrade).