Alex,
Follow log coraout. I did not understand why this error, this user has the same permissions in the approval and production environment. In the homologation environment works and in the production environment does not work.
18/10/16 13:26:05: [ 10272] ERROR Cora.SqlSrvr - 47913680 SQLSRVR::logon [Microsoft SQL Server Native Client 11.0] [ SQL Code=18456 SQL State=28000] Login failed for user 'mdbadmin'. [sqlclass.cpp:128]
18/10/16 13:26:05: [ 10272] ERROR Cora.SqlSrvr - 47913680 Throwing CCoraException((LONG) CORA_ERROR_CCORAMSS_INIT, (PCHAR)_datasource.GetLastErrorMsg())sqlclass.cpp/130 [sqlclass.cpp:130]
18/10/16 13:26:05: [ 10272] ERROR Cora.SqlSrvr - 47913680 SQLSRVR::logon catching (...) [sqlclass.cpp:135]
18/10/16 13:26:05: [ 10272] ERROR Cora.SqlSrvr - 47913680 SQLSRVR::logon throwing 470224 [sqlclass.cpp:136]
18/10/16 13:26:05: [ 10272] ERROR Cora.SqlSrvr - 47913680 Throwing CCoraException((LONG) CORA_ERROR_CCORAMSS_INIT, (PCHAR)_datasource.GetLastErrorMsg())sqlclass.cpp/139 [sqlclass.cpp:139]
18/10/16 13:26:05: [ 10272] ERROR Cora.CCoraMss - 47719792 CCoraMss::DbConnect catching cre [coramss.cpp:511]
18/10/16 13:26:05: [ 10272] ERROR Cora.CCoraMss - 47719792 Throwing crecoramss.cpp/512 [coramss.cpp:512]
18/10/16 13:26:05: [ 10272] ERROR Cora.CCoraApi - 10357448 ca_reg_initW catching cre [coraapi.cpp:1675]