How do I debug a ProcessFlow?

I am new to ProcessFlow need a little help debugging a flow using the Eclipse designer.  

We are an Infor Managed Services customer, i.e., they host our Lawson servers.  Their policy is that managed servers cannot be joined to the customer's domain, so we must use FTP to transfer files from our systems to the Lawson server.   

To use FTP from within PF, IMS created a Lawson program, MS100.  It's a form with parms that specify the FTP particulars, local server IP, user, password, file to transfer, etc.  MS100 behaves like any other Lawson program; it that can be used in a jobdef, and when run in portal or LID, it creates log and print files.

If a job barfs, e.g., a file to be pulled to the Lawson server does not exist, the print file shows errors: e.g. "an error occurred during transfer, no such file"

To run it in a ProcessFlow, the MS100.gnt file is passed to the Microfocus run.exe in a SYSCMD node, as well as some other parms including the NT ID of the Lawson user running the job, and the jobdef name. When it's complete, the log appears in the PF console.    

However, neither the job's log nor the print file appear for that Lawson user in portal.

OK, actual questions:

My normal process is to develop and test small sections of code, and verify they are working correctly.  In other tools, I would step through the code and display values, sometime in a debugger, or even simply writing variable values to the screen, web page, etc.  How does one step through a flow and examine variable values in order to know that it's working properly?  E.g., there's a SYSCMDnnnn_outputData variable that might help… how do I look at it's value?


Second question is how does one trap an error that occurs in the SYSCMD node?  In this case, the log in the PF console shows "System command returned error code 0" even though the job barfed.  I might be able to parse the print file, but it's not created when the MS100 job is run from PF.

Thanks,