Process chain to trigger automatically after file arrives in AL11.

Hi All,
There is a text file(.txt) which comes from mainframes team every Sunday between 11 AM to 6 PM and gets placed in AL11 inbound directory following which we manually trigger a process chain which uses this file.
The requirement is that this chain should trigger automatically after the file arrives in AL11 in BW.
Is it necessary for the mainframe team to send another control file or some other file in addition to the text file to trigger this process chain..?
Is there any other way the process chain can be triggered in BW without any changes required from the mainframe team.
Additional information:
Also I came to know that this can happen through some system command statements using SM49 we can schedule this chain.
Else can some ABAP Program code be used to make this process automatic?
Please help me.

Hi,
You can do the following, in your process chain change the start variant and make it event dependent. Now you can do the following,
1) Create a table in SE11 which will have fields like Process chain name and execution date as primary fields. This table will be used further for checking purpose.
2) Now create a ABAP program as shown in below given article, in this program in addition to raising an event you will have to read the file from app server.
3) If program can read file from app server means you will raise an event and make entry in above table for preventing further execution of process chain. If program can't read file from app server then program will simply end without doing anything.
4) Now you can schedule this program after every hour or 30 min. as per your requirement, the program will first check if the process chain execution entry exists in the above 'Z' table or not. If entry exists means the process chain has been already executed and the program will be terminated.
5) You can use FM to read data from app server. You need to be careful while placing file on app server, because it has to be different naming convention or something else to identify that the current day file is available.
[http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/a01cc44a-5aac-2d10-3eaa-a3bbf645d25c?QuickLink=index&overridelayout=true]
Regards,
Durgesh.

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/people/siegfried.szameitat/blog/2006/02/26/restarting-processchains

Process chain to trigger automatically after file arrives in AL11.

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