DATA%20BLOCKED due to BadFormChars

Document ID : KB000100560
Last Modified Date : 08/06/2018
Show Technical Document Details
Issue:
We are getting an error with DATA%20BLOCKED while trying to access a protected resource:

[10/04/2017][23:37:54][10789][21][CSmHttpPlugin.cpp:657][CSmHttpPlugin::ProcessResource][0000000000000000000000000abbb50f-2a25-59d562c2-0015-06cc5a3f][xx.yy.zz.aa][][wa_abc_portal_xyz][][][Resolved URL: '/portal/login/loadLogin.do?smauthreason=0&target=DATA%20BLOCKED'

We are using custom login.fcc which is encoding the target.

How can we resolve this?
Environment:
WebAgent : R12.52 SP1 CR06
Cause:
Issue occurs when the fcc is URLEncoding the target, and the encoded characters are set in the ACO parameter "BadFormsChars"
Resolution:
If you don't want the bad form char characters to apply, please set the parameter to an empty value. 

BadFormsChars="" - No characters are encoded. 

Solution Document: QO97363 
By default they are all set (i.e. BadFormsChars="<,>,&,""). 
https://support.ca.com/us/download-center/solution-detail.html?docid=459379&os=WIN2003&aparno=QO97363