Hi mike.cravenkcngfc, welcome to Thunkable! 
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The issue is with how you are setting or calling these variables, you’re using the blocks for dynamically named variables. This block is looking for text so when another variable block is placed here, an error occurs.
Instead, use the set variable for static names when setting Full Project List.
For setting the text or text items to a variable, you’ll want to use App Variable name block.
