Difference between PAPI activityExecute and activityPost

Im am interacting with a process using PAPI from a webservice. What we need is to be able to interact with specific activities in the process, and send in and take out arguments. We have been using activityPrepare and activityCommit, calling both methods in the same JTA transaction. The problem is that if an error occurs the activity can be left "prepared" and then locks the activity from other participants. I have been thinking of using executeActivity instead (having activities of type method interactive) then I found the activityPost method in the javadoc. What is the difference between the two. And which one should I use from a webservice, if i just want to interact with a specific activity, sending in data and sending the activity to the next activity.

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Edited by: user12036530 on Oct 18, 2009 9:08 PM

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Message was edited by:
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Difference between sy-tabix and sy-index?

tell me about sy-tabix and sy-index?what is the difference between sy-tabix and sy-index?
Moderator Message: Please search before posting. Read the [Forum Rules Of Engagement |https://wiki.sdn.sap.com/wiki/display/HOME/RulesofEngagement] for further details.
Edited by: Suhas Saha on Jun 18, 2011 5:33 PM

HI,
Here is a brief description of difference between SY_TABIX and SY_INDEX and using them with several conditions.
SY-TABIX
Current line of an internal table. SY-TABIX is set by the statements below, but only for index tables. The field is either not set or is set to 0 for hashed tables.
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SY-INDEX
In a DO or WHILE loop, SY-INDEX contains the number of loop passes including the current pass.
Hope this helps.
Thank you,
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What is difference between sy-index and sy-tabix and where both are using ?

what is difference between sy-index and sy-tabix and where both are using ?

hi nagaraju
sy-tabix is in Internal table, current line index. So it can only be used while looping at the internal table.
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Itab is an internal table with the following data in it.
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DATA: DATEDIFF TYPE P.
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difference between sy-datum and sy-datlo

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