Jnr,

This error is occuring because a reference to a smartobject is missing within the current process or there is a mismatch in smartobject properties in the environment where the package is being deployed. If you think it is your workflow then you can step through the start task and make sure the correct smartobject is being called. I would also look at any references to make sure they are pointing to the right smartobject. 

My personal opinion is that a reference has been changed on one of your forms. You can peak through the rules and see if there are any broken references. The other thing I have learned is that when deploying a package if there is any mismatch between the smartobject in the package environment and the deploy environment you will get a similar error. I have had something as simple as one column type as varchar(20) while the deploy environment was varchar(50) and the deployment failed.

I hope this helps.

Thanks,

Bryan Peters