SQL Invalid cursor number 135 error

Question

We are having this error as given below when we are running are schedule job.The message which appears on the log file is given below. I dont know what SQL 135 Invalid cursor means.Could you please give us some information regarding this issue.SQL ERROR INFORMATION=====================CODE [DB0101]TEXT [SQL 135 - Invalid cursor number.]DESCRIPTION-----------Centura Error: 135Centura Message: Invalid cursor numberCentura Function: sqlcom (compile statement)Native Error: 0Native Message: STATEMENT---------SELECT TRANSACTION_TYPE FROM TRANS_HISTORY WHERE LINK_NUMBER = :1 AND ACCT_ID= :2 AND CLASS = :3 AND UNIT_NUMBER = :4 AND CERTIFICATE_NUMBER = :5 AND TRANSACTION_AMOUNT> 0 ORDER BY EFFECTIVE_DATEERROR MESSAGE=============SQL error 135 in User Function 201296/SQL 4 (selTransactionType)- function/info vWe are having this error as given below when we are running our schedule job.The message which appears on the log file is given below. I dont know what SQL 135 Invalid cursor means.Could you please give us some information regarding this issue.SQL ERROR INFORMATION=====================CODE [DB0101]TEXT [SQL 135 - Invalid cursor number.]DESCRIPTION-----------Centura Error: 135Centura Message: Invalid cursor numberCentura Function: sqlcom (compile statement)Native Error: 0Native Message: STATEMENT---------SELECT TRANSACTION_TYPE FROM TRANS_HISTORY WHERE LINK_NUMBER = :1 AND ACCT_ID= :2 AND CLASS = :3 AND UNIT_NUMBER = :4 AND CERTIFICATE_NUMBER = :5 AND TRANSACTION_AMOUNT> 0 ORDER BY EFFECTIVE_DATEERROR MESSAGE=============SQL error 135 in User Function 201296/SQL 4 (selTransactionType)- function/info values = DB_Compile/noneRegards,JawadGESB Australia..