ORA-01001: invalid cursor tips Oracle Error Tips by Donald Burleson

 

The Oracle docs note this on the ora-01001 error*:

 

The ORA-01001 error occurs when:

•  a host language program call gave an invalid cursor for use
• the value of the MAXOPENCURSORS option in the precompiler command was too small

You can fix the ORA-01001 error by:

• Check your problematic call statement for any issues
• Specify a correct LDA area or open the cursor as required
• As a last resort, increase the MAXOPENCURSORS option value before precompiling

As a note, the ORA-01001 error does not exist in Oracle 10g, according to the Oracle documentation.

---

OraFaq.com has the following to say about the ORA-01001 error:

This is 100% a program logic problem. You have either forgotten to code an open statement before using a cursor, or have not noticed that the cursor has been closed and have tried to continue using it. The following checklist may help identify the fault:
 

Make sure you have an OPEN statement prior to using any explicit cursors.
 

Make sure that you do not have a misplaced CLOSE statement.
 

If you need to do a sequence of OPEN...CLOSE...OPEN...CLOSE (perhaps because you need to reset bind variables or to commit updates inside a loop) check your logic flow and make sure there are no fetches between the 1st CLOSE and the 2nd OPEN.
 

If you have nested loops, check that a condition in an inner loop is not being missed which allows control to pass unexpectedly to a CLOSE in an outer loop
 

Remember that a PL/SQL FOR loop does an implicit OPEN and CLOSE. If you take a routine with a FOR loop and change it to a WHILE loop you must remember to code the OPEN and CLOSE.