Hi, yes I remember having problems trying to call a STX with STeem using a command line (essentially how your front end would be working).
A little fish around and I saw this message thread
What Russ is saying is relevant to the current release of STeem (3.2) - there has so far been no official release after this. Russ does mention that he had 'fixed' this issue ready for the next release, but this never made it to the community. However, there has been a recent development this year in that Russ and Ant have now release STeem as an open source project - it's possible that the code release may actually include the 'fix' that Russ talks about - which would be slightly confusing as the source was released as v3.2 so we end up with the source and the officially available compiled version being out of kilter
So, you're options are:
1. Look at Russ's suggestion of modifying the ini file up front with Disk_A_Path and Disk_A_Name pointing to your STX before calling "STeem -run"
2. Checkout the current source code from the svn repository
, compile it and see if it includes Russ's pasti fix - you may be surprised?