Here is an advice on how to limit the number of decimal digits in an Abaqus (or any solver) export from HyperMesh 2020:
1) Open the desired Solver Export Template from your installation ../hwdesktop/templates/feoutput/ directory in a Text Editor
2) Edit the line "*realprecision" to be the number of desired decimal digits. Save the export template under a user defined name
3) Go to the Export - Solver Deck function and choose "custom" as export. You can then choose your modified solver output template and export your file.
This Video shows the necessary steps:
https://www.screencast.com/t/8Cz2pmHE
