R/3 dataflow concurrent loading

Question

Hi
In my enviornment, users will be executing batch jobs via webservices. The users will pass a fixed set of parameters to the web service job. The job will have an R/3 dataflow connected to an SAP GL source.
My question is how can I make the the data transport filename to be dynamic, since it does not accept global variables.
I have tried the following options
1. I can use a substitution parameter, but in my case the webservice (fixed parameters. We are using BO FIM 7.0 to call DS jobs. FIM passes only certain parameters to DS) call cannot pass a value for the substitution parameter and I cannot assign a value dynamically to substitution parameter within the job using the remaining parameters
2. I can use a direct table connect using the RFC_TABLE_READ but may not be efficient, since we will be accessing multiple SAP systems with lot of joins and lookups, I am not sure if this will scale up to the data volume. We have clear benchmarking results that we want to attain.
The DS SAP supplemental guide p.170 says that R/3 dataflows submitted concurrently will be serialized but will be run in parallel if the server has more than one batch processor available. It does not mention how the data transport file name is handled if the same job is handled concurrently.
How is the data transport file name handled, if the same job is being run concurrently by different users with different parameters.
Has anyone faced this issue ? Any work arounds would be helpful
We are using DS 3.1 on windows
Thanks
Dinesh

Answer 1

There was a fix in XI 3.1 ServicePack 1 to support global variables in data transport file names.