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PRPC Login Screen error and "XML file does not have style info"



After installing Pega 7.17, the login screen does not appear correctly. The user sees the below response:

<title>PegaRULES Request Status</title>
<username>Unauthenticated or not available</username>
<etierversion>PegaRULES 7.10 ML7 (coreAssemblyCached_717_632)</etierversion>

Error Messages

2017-07-28 11:41:46,521 [ WebContainer : 0] [ STANDARD] [ PegaRULES:07.10] (WEB_LOGIN.Code_Security.Stream) ERROR a_host| - Section 'Web-Login' execution error.
java.lang.NoClassDefFoundError: com.pegarules.generated.pega_desktop_httprequestheader
at com.pegarules.generated.html.ra_stream_web_login_1dd1fd7bc7242b5b55d316f11225fe0c.execute(
at com.pega.pegarules.session.internal.mgmt.Executable.getStream(
at com.pega.pegarules.session.internal.mgmt.Executable.getStream(
at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(
at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivitiesAlt(
at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.runActivities(
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Caused by:
java.lang.ClassNotFoundException: com.pegarules.generated.pega_desktop_httprequestheader
at com.pega.pegarules.internal.bootstrap.phase2.PRBaseLoader.findClass(
at java.lang.ClassLoader.loadClassHelper(
at java.lang.ClassLoader.loadClass(
at com.pega.pegarules.internal.bootstrap.phase2.PRBaseLoader.loadClass(
at java.lang.ClassLoader.loadClass(
at com.pega.pegarules.bootstrap.loader.PRAppLoader.loadClass(
at com.pega.pegarules.bootstrap.loader.PRAppLoader.loadClass(
at com.pega.pegarules.exec.internal.util.classloader.PRClassLoaderDB.loadClass(
at java.lang.ClassLoader.loadClass(
at com.pega.pegarules.exec.internal.util.classloader.PRClassLoaderDB$Loader.loadClass(
at java.lang.ClassLoader.loadClass(

Steps to Reproduce

Try to access via url https://a_host:a_port/prweb/PRServlet

Root Cause

In PegaRULES.log, the following Pega build version is found:

2017-07-28 11:37:13,186 [ server.startup : 0] [ ] [ ] (ervlet.WebAppLifeCycleListener) INFO - coreAssemblyCached_717_632: 2014-11-07 18.29 EST
2017-07-28 11:37:13,186 [ server.startup : 0] [ ] [ ] (ervlet.WebAppLifeCycleListener) INFO - http://camscm/svn/PRPC_core/branches/integration/717/dev/core (112210) Pega 7.1.7 has released with an incorrect build in the past and a new Pega 7.1.7 media has been re-released. The build of coreAssemblyCached_717_632 is not from the stable release of Pega 7.1.7


Obtain the stable release of Pega 7.1.7 with part number of 114716_Pega717 and reinstall the product.

Suggest Edit

Published August 26, 2017 - Updated October 8, 2020

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