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Review the program lines immediately before the canned cycle call. Verify that X, Y positioning moves are completed before the canned cycle is initiated.

Check that the R address (retract/reference plane) is specified in the canned cycle block and that its value is logical relative to the Z initial position.

Ensure G90 (absolute) or G91 (incremental) mode is correctly set for your application. Verify Z-axis current position is above the R plane in absolute mode.

Add an explicit positioning move (G00 Z__ or G00 X__ Y__ Z__) to establish the initial point before the canned cycle line, then re-run the program.

Identify the specific canned cycle G-code being used (G73, G74, G76, G81-G89) and reference the Fanuc programming manual for required addresses.

Verify that the Z address (hole bottom/depth) is specified and is different from the R address. Check that Z depth is deeper than R plane in the intended direction.

For peck drilling (G73, G83), confirm Q address (peck depth) is specified. For tapping (G74, G84), verify F (feedrate) and spindle speed are programmed.

Check for illegal parameter combinations such as R and Z being equal, missing F address with feed-dependent cycles, or zero/negative values where positive required.

Review the program for active cutter radius compensation (G41/G42). Cancel with G40 before initiating the canned cycle block.

Ensure G40 is called after the last compensated contour move and before repositioning to hole locations.

Check if circular interpolation (G02/G03) or other motion G-codes are active. Insert G01 or G00 in a positioning block before the canned cycle.

Verify that a previous canned cycle was properly cancelled with G80. Some controls require explicit cancellation before switching to another cycle type.

Ensure plane selection (G17/G18/G19) is appropriate for the canned cycle. Most drilling cycles require G17 (XY plane). Add the correct plane code if necessary.