This article explains the procedure to fix if the import of SRX fails in Security Director due to a missing object in the application signature.
You may observe the following error
1. Navigate to Security Director >> Configure >> Application Firewall >> Signatures >> Verify the presence of the DNS object.
2. If the object is not present, proceed to Security Director > Administration > Signature Database.
3. In the latest list of signatures, perform a full download of signatures.
4. Post which import of the firewall policy should be successful
5. If the issue persists, please contact JTAC support for further assistance.