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Return argument has an invalid type

KB ID:	1288
Product:	Veeam Backup & Replication
Version:	5.x, 6.x
Published:	2011-10-07
Last Modified:	2020-08-13

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Challenge

Veeam Backup Enterprise Manager fails to collect data from a Veeam Backup server with the following error:

Return argument has an invalid type.

The following error can be seen in VeeamBES.log:

[timestamp] Info Reporting data were successfully collected from the server [server.local]

[timestamp] Error Interrupting collect session. Return argument has an invalid type.

[timestamp] Error Unable to collect data from Veeam Backup Server xxx.xxx.xx.x

[timestamp] Error System.InvalidCastException: Return argument has an invalid type.

Cause

The version of Veeam Backup Enterprise Manager differs from the version of Veeam Backup & Replication.

Solution

Make sure that Veeam Backup Enterprise Manager and Veeam Backup server have the same version. Veeam Backup Enterprise Manager can only collect data from backup servers of the same version.

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