How to check whether the Application Server file has already been opened?

Hi Experts,
I have a query related to Application Server file. I am using multithreading concept to process the data and write it in to a single file.
For example, I have 4 workprocesses. Each workprocess will process the data and whenever it has a record available it will access the file and write it directly.
Problem is the statements that are written in the workprocess is same and I want to check the status whether the file has been opened or not ?
Thanks in advance!!!
Thanks,
Babu Kilari

Depends on the structure, and whether the data needs to be sorted in some way in the final file.
In any case, I don't think there will be a significant performance difference between using OPEN DATASET again and getting funny with Unix commands.
If you don't need to sort the final file, you can use strings to read, concatenate and write the data even without line-based DO ENDDO loops, this works pretty fast.
I hope we are not talking about GBytes of data
Thomas

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How to check whether the Application Server file has already been opened?

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