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What is the meaning of error codes received during USB key authorization/upgrade in Vijeo Citect

Find following a complete list of known key return codes in Vijeo Citect that may be encountered after updating the key :

 Error Code Result of Key Update
0 The key was updated successfully
1,3,4,16 Either the KeyID or the Authorisation code entered is invalid 
2 Either the KeyID or the Authorisation code entered has been corrupted
7 Too many keys are attached to the parallel Port
9,105,109 No hardware key could be found
102 Write failed (key may be defective or may be PC hardware/software problem)

If an "Error Initializing Key" message is encountered after reading the key, there might be a need to upgrade the Sentinel System Driver to the latest version.
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