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MQSeries.net Forum Index » General IBM MQ Support » MQ Series and EBCDIC to ASCII Conversion

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gazza_az
PostPosted: Mon Dec 13, 2010 3:35 pm    Post subject: MQ Series and EBCDIC to ASCII Conversion Reply with quote

Newbie

Joined: 13 Dec 2010
Posts: 1
We have a problem.
We have an application on the Mainframe that allows textual descriptions. We have a DB2 trigger that on change sends a message via MQ Series to a client server application. We have a web service that is invoked via a Tibco EMS process - from the Message on the MQ Series Queue.

We have discovered that when we recieve text containing '[' or ']' values - the fields following are displaced by a byte, and we actually see an invalid date error. We have removed the bad characters from the string and everything is fine.

My Question is this - are there any other characters in EBCDIC that will cause a similar problem. We may have to put a text scrubbing algorithm to replace the square bracket with rounded parenthesis. And I have been researching EBCDIC to ASCII conversion - but cannot find a definitive text that outlines problems and characters to avoid.
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fjb_saper
PostPosted: Mon Dec 13, 2010 8:20 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
I suspect very much that you are converting before you are parsing.
And possibly converting to UTF-8.
This is problematic because you are counting in bytes for your parsing instead of counting in characters. Thus any character that converts from a single byte (EBCDIC) into multiple bytes (UTF-8 ) will cause you problems.

This is normal and expected behavior. Your suggested solution is looking at it the wrong way. Transform the UTF-8 stream into a String of characters and then parse using the # of characters in the field...

Have fun
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