NetWorker: NMM Hyper-v Flat file Restore Required Parameter for RCT backups

Summary: NMM-Hyper-v-Flat-file-Restore-Required-Parameter-for-RCT-backups

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.

Symptoms

NMM Hyper-v Flat file Restore would Fail with the following error:

nsrnmmrc NSR critical 37 Metadata Manager failed to initialize 0.
132938:nsrnmmrc:Fatal error during processing of the Metadata file for savetime -- nsavetime.

 

Cause

The Flat File restore default is set to VSS using parameter NSR_SNAP_TYPE.

The nsrnmmrc debug log shows.
180351: nsrnmmrc: Application Information NSR_SNAP_TYPE=vss or NSR_SNAP_TYPE=rct is not provided, adding NSR_SNAP_TYPE=vss as default it to the parameter list for VSS-based recovery.

If backup was taken with RCT enabled, then restore fails.

Resolution

Running Flat file restore identify backup was taken RCT or VSS. 

For RCT, you have to specify the following. 
NSR_SNAP_TYPE=rct 

NOTE: To find out how the backup was taken, you can use mminfo or nsrinfo to validate.


Using mminfo:

mminfo -Sot -q SSID=4268368342

Where the SSID is the metadata SSID APPLICATIONS:\Microsoft Hyper-V\Windows 2016.
And look for *NSR_RCT_DISK_RCT_ID:

Using nsrinfo:

nsrinfo -v -n nmm_bbb Clustername >C:\nsrinfo.txt

And look for NSR_RCT_BACKUP: TRUE;

Affected Products

NetWorker, NetWorker Module for Microsoft
Article Properties
Article Number: 000170182
Article Type: Solution
Last Modified: 21 Jan 2026
Version:  5
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