Control subvi execution order

I have a test program with 2 subVIs and the first one simply creates a text file and writes a large string to it, the second one writes another string to the same file and then closes it. Is there a way to set execution order as the subVI that writes and then closes the file seems to be executing first. The subVis are independent from each other. Thanks.

No.  Just wire the error out of the first VI to the error in of the second VI.
When you switch from a text-based language to LV, the hardest thing to realize is that the position on the diagram has essentially nothing to do with the order of execution.  The dataflow concept is very powerful but quite foreign to text programming.  The core point is that any node (function, subVI, structure,...) may begin to execute when data is present at ALL of its inputs.  Similarly, the node's outputs are not available until the node completes its execution.
Lynn

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