How To Fix SNC018 - Error occurred when processing external ID (RC=&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: SNC - Secure Network Communication, SNC

• Message number: 018

• Message text: Error occurred when processing external ID (RC=&1)

What causes this issue?

The system attempted to logon to a server with an external
identification (a X.509-certificate). There was an error processing the
certificate. The error code (RC) describes the error in more detail.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Description of the error code:
100 Length of the transferred certificate exceeds maximum length
101 LIBSAPSECU could not be loaded
102 Earlier attempt to load LIBSAPSECU failed
200 Certificate could not be parsed (not ASN-coded or
incomplete?)
201 Subject could not be determined from certificate
202 Issuer could not be determined from certificate
203 Serial Number could not be determined from certificate
204 Validity could not be determined from certificate
221 Subject in certificate, exceeds maximum length
222 Issuer in certificate, exceeds maximum length
223 Serial Number in certificate, exceeds maximum length
224 Validity in certificate, exceeds maximum length
300 The base 64 coding of the certificate contains invalid character
formats

System Response

The logon is refused, the connection is broken.

How to fix this error?

Contact the system administrator to resolve the error.
If there are problems with the certificate analysis, setting trace
level 2 means that the certificate can be output and examined in the
developer traces.
If there are problems loading the LIPSAPSECU, check if the library
under the name specified in the profile exists and is available.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.