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Review the program at the alarm occurrence point. Press RESET, then navigate to PROGRAM > display the active program and locate the G70, G71, G72, or G73 cycle and its associated shape definition blocks.

Examine the last block of the shape program (before the cycle call). Verify all required arguments for direct drawing dimension input are present: X, Z, I, K, R values as appropriate for the commanded shape element (line, arc, chamfer, or radius).

Ensure the shape program is properly closed with a complete geometry command. Add missing dimension data or remove the incomplete block. For G70-G73 cycles, the shape must end with a valid endpoint definition.

Verify parameter 3405 bit 4 (DWG) is set to 1 if using direct drawing dimension input. Navigate to SYSTEM > PARAM > search for parameter 3405 and confirm bit 4 = 1 for drawing dimension mode.

Changing parameter 3405 requires parameter write enable (PWE) switch ON and CNC restart after modification.

Check the program format at the end of the shape definition. Ensure each block ends with a semicolon (;) or proper EOB character, especially the final block before the G70-G73 cycle call.

If using a DNC or external program transfer, verify parameter 0020 (TV) input channel settings are correct. Navigate to SYSTEM > PARAM > 0020 to confirm proper I/O configuration.

Re-edit the program and add the missing semicolon or EOB character to the last block of the shape definition. Ensure proper formatting per Fanuc programming standards.

Verify the G70-G73 cycle command references the correct starting (P) and ending (Q) sequence numbers. Example: G71 P100 Q200 should have N100 as start block and N200 as properly formatted end block.

Check that sequence number N(Q value) exists in the program and contains a complete geometry command with all required drawing dimension arguments (X, Z, I, K, R as needed).

Ensure no sub-program calls (M98) or other interrupting commands exist within the shape definition blocks between P and Q sequence numbers that could cause improper termination.

Rewrite the shape program with proper block sequence and complete dimension data in the final block, ensuring the Q-designated block contains a fully specified geometry command.