we need to reinstall the netflow plugin, and it generated the following error:

HTTP Status 500 -

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type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

java.lang.NullPointerException com.adventnet.npm.NFAAuthFilter.doFilter(NFAAuthFilter.java:241) com.adventnet.netflow.utils.EncodingFilter.doFilter(EncodingFilter.java:67) com.adventnet.iam.security.SecurityFilter.doFilter(SecurityFilter.java:462) com.adventnet.authentication.filter.AssociateCredential.doFilter(AssociateCredential.java:43) 

note The full stack trace of the root cause is available in the Apache Tomcat/@VERSION@ logs.

---

Apache Tomcat/@VERSION@

This used 

Opmanager version 10
 Build Number : 10100

NetFlow Plugin version 9800

Thank's for help !!