DataGridBuilder returns "java.lang.IllegalArgumentException: Dimension not found"

Summary:

Groovy business rule submitted data to BSO cube via DataGridBuilder is failing with error "java.lang.IllegalArgumentException: Dimension not found"

Content (required):

The rule has two parts which work on different parts of the database. Each has a DataGridBuilder to submit. The first is working fine and the second fails. Using try/catch returns "java.lang.IllegalArgumentException: Dimension not found". All the dimensions are definitely represented in the grid. Does anyone have any idea what this error might mean and how to further debug?

Version (include the version you are using, if applicable):

EPBCS

Code Snippet (add any code snippets that support your topic, if applicable):