Today I got a strange error in a customer environment while logon to our Datacap applications. When you try to logon in the Navigator administration desktop you receive a HTTP 500 error.

When you take a look in the SystemOut.log of the WebSphere Server where Navigator is running you just see this error:

000000c8 SystemOut O CIWEB.DatacapWebPlugin Error: [admin @] [REQUEST 113]
Message ID : 6306
Message type : ERROR
Text : Diese Operation kann nicht verarbeitet werden.
Explanation : Bei der Verarbeitung von {0} ist ein E/A-Fehler aufgetreten.
User Response : Wiederholen Sie diese Operation oder wenden Sie sich an Ihren Systemadministrator, um Hilfe zu erhalten.
Admin Response : null
More Information: null

On the wTM side you see no error at all and also a successfull logon from Navigator. For some reason the JSON data the Navigator received from wTM is malformed.

In the end it turned out that a wrong URL within the Navigator EDS Plugin was the root cause for this issue.

At the customer environment somebody just entered “test:9080″ as the EDS servlet URL.

After disabling the Plugin everything works fine and you can log in again to the Datacap applications.

A small problem with a big impact :-).

95 thoughts on “IBM Datacap – Receiving HTTP500 error while logon to a Datacap application

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