Hello,
Can you run <hpe> dir and check what is name of .cfg file?
I believe it would be start-up config and when you will do 'save force' then it will write the configuration into this file
<HPE>save force
or
<HPE>startup saved-configuration <..cfg file name> main
You can check the file by running below command:
<HPE>more startup.cfg
You can also rename the .cfg file by below command:
<HPE> rename <current .cfg file name> flash:/<new .cfg file name>
Thanks!