hier ein Hinweis – lieber spÃ¤t als nie ;):
Check for a previous SQL return code that may have
closed the cursor. Commit and rollback operations close cursors. SQLCODES -404, -652, -679, -802, -901, -904, -909, -910, -911, and -913 will force the cursor to close. After the cursor is closed, any fetches or close cursor statements will receive this SQLCODE -501.
If no previous SQL return codes have been issued, correct the logic of the application program to ensure that the cursor is open at the time the FETCH or CLOSE statement is executed.