Spawing new Progress session from Progress..

Hello,

I'm tasked with writing a program that as part of it's functionality "spawns" new Progress sessions which will lock records for a certain amount of time.

Basically, the program is designed for a tester to reproduce conditions in an application that a customer on site may experience by reproducing the DB activity. It does this by recording the record locking activity over a certain period of time and outputting this to a file. The file is then read back in and the DB locks are reproduced by spawing a new process and locking each record for the duration recorded for that record in the file.

My question is what should I be using to do the spawning? prowin32, bpro or something else?

I've tried prowin32 and bpro but have struggled to get parameters passed across to the new spawned process. I've tried -param for prowin32 and ARG for bpro but neither seems to work?

E.g.

OS-COMMAND("C:\dlc10\bin\prowin32.exe -p user-load-spawned.p -param " + ttLock.File_Name).

gives me

---------------------------
Error
---------------------------
** Your database name is longer than 11 characters. (448)

---------------------------
OK   
---------------------------

or bpro which according to Progress : "Starts a single-user OpenEdge client session in batch or background mode."

OS-COMMAND('C:\dlc10\bin\bpro -b -p user-load-spawned.p ARG=' + ttLock.File_Name).

gives

** Could not recognise argument: +. (301)

and also an unwanted client session Window.

I have found this post on this forum; https://community.progress.com/community_groups/openedge_general/f/26/t/7557 but it hasn't really answered my questions.

Any help would be greatly appreciated,

Thanks.