Getting data from one module to another

Hi,

I have two modules with project data.

The first module has a dimension of serial numbers (1,2,3,4). it is not a numbered list. One of the line items is defined as a list format of project numbers. this list is a numbered list.

The second module has a Dimension of the project numbers (numbered list). 

I need to pull data from the first module to the second one. I've tried the lookup function but it's doesn't work.

What function can I use?

thank you