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Support Article

External Assignment using DWA throws browser error - 400



An External Assignment is setup by leveraging the Direct Web Access (DWA) feature. When clicking the link from within the External Assignment a browser exception is seen.

Error Messages

Browser Exception:

Tomcat Log Exception:

java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986

at org.apache.coyote.http11.InternalAprInputBuffer.parseRequestLine(

Steps to Reproduce

  1. Configure an External Assignment using the DWA feature.
  2. The user gets the email with a link.
  3. Click on the DWA link and observe an IE 400 error.

Root Cause

A defect in Pegasystems’ code or rules.


Apply HFIX-32032

Published February 21, 2017 - Updated October 8, 2020

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