** Troubleshooting ** 'Could not login to TM1 ... SystemServerClientNotFound' error when publishing Controller data to TM1 via FAP

Troubleshooting

Problem

User launches FAP client ("IBM Cognos FAP") from the start menu. User logs on. User clicks tab 'data marts' and highlights the relevant data mart. User clicks "Start" (to start the initial publish).

After a few seconds, the 'status' changes to 'Error'. User clicks the 'logs' tab. Inside there, there are more errors.

If the user hovers their mouse over the error, a new message is seen.

Symptom

The symptom can vary slightly depending on environment/Controller-version/scenario.

However, in general they look similar to these screenshots.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Example #1 - Controller 10.3.1:

Data mart tab:

Logs tab:

Could not login to TM1, host: server name:
SystemServerClientNotFound

'Error.log' file (by default, located here: C:\Program Files\ibm\cognos\ccr_64\server\FAP)

13:56:37,541 | INFO [fap.service.schedule.Scheduler] [schedulerThread], FAP service started on host:<servername>
13:57:08,589 | ERROR [fap.service.schedule.Scheduler] [schedulerThread], Could not logon to TM1
com.ibm.cognos.tm1.TM1Exception: SystemServerClientNotFound
at com.ibm.cognos.tm1.API.logonCAMNamespace(Native Method)
at com.ibm.cognos.fap.common.persistence.tm1.TM1Context.login(TM1Context.java:111)
at com.ibm.cognos.fap.service.schedule.Scheduler.updateDatamarts(Scheduler.java:537)
at com.ibm.cognos.fap.service.schedule.Scheduler.run(Scheduler.java:253)
at com.ibm.cognos.fap.service.schedule.Scheduler$1.run(Scheduler.java:158)
at java.lang.Thread.run(Thread.java:785)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Example #2 - Controller 8.5.1:

Object: FAP Service
Severity: CRITICAL
Description: Could not login to TM1, host: SERVERNAME, server name: TM1 SERVER NAME, user name: admin

If hover the mouse over the error, a new message appears:

Could not logon with to CAM with user: <username> to ClientCAMURI http://servername/cognos8/cgi-bin/cognosisapi.dll

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All Versions","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]

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Troubleshooting 'Could not login to TM1 ... SystemServerClientNotFound' error when publishing Controller data to TM1 via FAP