# Validation failure error codes in Amazon EMR
<a name="emr-troubleshoot-error-errordetail-validation"></a>

The following sections provide troubleshooting information for validation failure error codes.

**Topics**
+ [VALIDATION\$1ERROR\$1SUBNET\$1NOT\$1FROM\$1ONE\$1VPC](VALIDATION_ERROR_SUBNET_NOT_FROM_ONE_VPC.md)
+ [VALIDATION\$1ERROR\$1SECURITY\$1GROUP\$1NOT\$1FROM\$1ONE\$1VPC](VALIDATION_ERROR_SECURITY_GROUP_NOT_FROM_ONE_VPC.md)
+ [VALIDATION\$1ERROR\$1INVALID\$1SSH\$1KEY\$1NAME](VALIDATION_ERROR_INVALID_SSH_KEY_NAME.md)
+ [VALIDATION\$1ERROR\$1INSTANCE\$1TYPE\$1NOT\$1SUPPORTED](VALIDATION_ERROR_INSTANCE_TYPE_NOT_SUPPORTED.md)