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Locate the program block triggering the alarm and identify the figure copy command (G73 or equivalent figure call).

Verify the figure definition block exists and contains all required parameters including start point, end point, and intermediate coordinates with proper I, J, K addressing.

Check that the number of coordinate points matches the control's requirements (typically minimum 3 points for a valid figure) and that all coordinates use consistent plane selection.

Confirm figure number referenced in the copy command matches the defined figure number and that figure definition appears before the copy command in program sequence.

Review all parameters in the figure copy command including rotation angle (R), scale factor (P), and number of copies (L) to ensure they are within valid ranges per your parameter manual.

Verify that scale factors are positive non-zero values and rotation angles are specified in correct units (degrees vs. radians based on parameter 5004 setting).

Check that the calculated result of copying and transforming the figure does not exceed machine travel limits or create coordinates beyond the control's numerical capacity.

Extreme scale factors or rotations may cause arithmetic overflow even if individual parameters appear valid.

Test with simplified parameters (scale=1.0, rotation=0, copies=1) to isolate whether the issue is with transformation values or the base figure data.

Verify that plane selection (G17 for XY, G18 for ZX, G19 for YZ) is explicitly defined before the figure definition and remains consistent throughout the figure copy operation.

Confirm that all coordinate data within the figure uses consistent absolute (G90) or incremental (G91) mode as required by your control's figure copy implementation.

Check that no plane change commands appear between figure definition and figure copy execution, as this can invalidate the stored figure data.

Review parameter 5000 series settings related to figure copy function to ensure the feature is properly enabled and configured for your machine coordinate system.

Some older Fanuc controls have limited figure copy functionality that may not support all plane combinations.