# Interpreting PKCS \#11 library error codes for AWS CloudHSM Client SDK 5
<a name="attr-errors"></a>

Specifying in the template a PKCS \#11 library attribute that is not supported by a specific key results in an error. The following table contains error codes that are generated when you violate specifications:


| **Error Code** | **Description** | 
| --- | --- | 
| CKR\_TEMPLATE\_INCONSISTENT | You receive this error when you specify an attribute in the attribute template, where the attribute complies with the PKCS \#11 specification, but is not supported by CloudHSM. | 
| CKR\_ATTRIBUTE\_TYPE\_INVALID | You receive this error when you retrieve value for an attribute, which complies with the PKCS \#11 specification, but is not supported by CloudHSM. | 
| CKR\_ATTRIBUTE\_INCOMPLETE | You receive this error when you do not specify the mandatory attribute in the attribute template. | 
| CKR\_ATTRIBUTE\_READ\_ONLY | You receive this error when you specify a read-only attribute in the attribute template. |