Code CVIS-038: Too many candidates to process.
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Too many candidates to process. alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Cause: There is not enough memory to perform the detection with the specified condition. The image has too many candidate patterns to find. Remedy: In the Geometric Pattern Match (GPM) Tool SETUP screen, check if you have the Orientation, Scale, or Aspect Ratio degrees of freedom enabled. If so, reduce the maximums and/or increase the minimums and try to find again. If it still fails, disable one or more degrees of freedom. Make the following adjustments to reduce the search candidates: z Use a complex geometry as the model. z Of Orientation, Scale, and Aspect Ratio, uncheck the unnecessary items. z Specify a larger score threshold. z Specify a larger contrast threshold. z Narrow the search ranges for Orientation, Scale, and Aspect Ratio. z Reduce the size of the search window.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code CVIS-038 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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