# Known issues of operation failure using AWS CloudHSM client version 5.12.0 on hsm2.medium
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The following issues impact AWS CloudHSM when using AWS CloudHSM client version 5.12.0

## Issue: Error during get-attribute operation
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If you're migrating from hsm1.medium to hsm2m.medium and using CloudHSM Client SDK 5.12.0, you may observe errors related to attribute handling.

You might see the following error message in the client logs: `Error in deserialization of data: Invalid integer conversion`

**Impact: Below operations will fail using client version 5.12.0**
+ In PKCS\$111 SDK, calls to C\$1GetAttributeValue fail
+ In CloudHSM CLI, the key list command shows no attributes in the output
+ In CloudHSM CLI, key generate-file may fail for keys generated using hsm1.medium

**Resolution: **We recommend upgrading to the latest version of the SDK which resolves this issue.