Network Management

"System.Security.Cryptography.CryptographicException: Length of the data to decrypt is invalid" error in event viewer log when Unmanage Scheduling Utility starts

This article provides information about an error generated by unmanaged utility after a scheduler starts.

First published date

2/24/2020 6:47 AM

Last published date

4/14/2026 10:02 PM

Overview

In the Event log, the following message may appear:

UnmanageRunner.log:

2020-02-13 13:11:02,873 [1] DEBUG SWEventLogging - System.Security.Cryptography.CryptographicException: Length of the data to decrypt is invalid.

Product section

Orion Platform

Cause

This issue occurs due design behavior of decryption with unmanaged utility.

Resolution

Important: As of SolarWinds Platform 2026.2, the Unmanage Scheduling Utility is deprecated. The tool is still supported in the current release. However, it will be removed in a future release. Deprecation is an indication that you should avoid expanded use of this feature and formulate a plan to discontinue using the feature.

To resolve the issue, please upgrade to SolarWinds Platform 2023.4 and above to avoid the message. If the upgrade is not possible, the message itself can be safely ignored. Unmanaged utility will remaining working as the first attempt will produce the message and fallback will work after.

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