Symptoms

Deployment Failed
 

Diagnoses

When attempting to deploy a Smarform integration process via K2 Designer, the following error is thrown:

Deployment Failed
System.ArgumentNullException: Value cannot be null
Parameter name: registeredWizard

When attempting to export this process to a .kprx, the following error is thrown:

An error has occurred while exporting the process:
The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
 

Resolution

We discovered that a Smartform integrated process will deploy successfully until the adding of a Smartforms client event. We determined that this is a recorded issue as per KB:

http://help.k2.com/kb001382

that usually occurs when a K2 Blackpearl repair was done but a K2 Smartforms reconfigure was not. Re-configuring K2 Smartforms resolved the issue.