Can not Start Flow ABCUnitFlow. FlowType missing

We are seeing error messages in pyWorkPage "Can not start the flow ACUUnitFlow on work object. The flowType is not present in the embedded flow page. Trying to save an invalid page: page is not valid". The assignment is getting assigned to Support Workbasket. There are no issues with the Work Object data. This doesn't happen always. It is sporadic. Verified all the custom components built around the Work Object processing and did not find any issues.

Can anybody provide some direction on what could be the possible reason? Thanks your time and help.

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August 10, 2010 - 1:42pm

Have you received a response to your SR? We are experiencing a similar problem and having trouble determining what is causing the issue but the end result is that 1 of the embedded .pxFlow pages is empty.

August 10, 2010 - 5:00pm

No. I have not heard back from the SR. I will update as soon as I hear from them.

September 13, 2010 - 12:27pm

We have applied the patch last week and so far we have not got any new "Cannot start flow ABCUnitFlow" error.

April 29, 2011 - 12:50am

Hi Nedunurp,

I am also facing the same issue. I searched for Hot Fix-2881 in Pdn but I could not find it.

Can you please share the details of HotFix.

com.pega.pegarules.pub.database.BadInputException: Trying to save an invalid page: Can not start the flow ABC on work object. The flowType is not present in the embedded flow page.
Trying to save an invalid page: page is not valid

August 2, 2010 - 4:17pm


We are facing a similar issue..Just to let u know in the pyWorkPage, there is a page group property pxflow..seems when the WO corrupts some how an empty page is created...Hope this helps u continue researching on this issue.

We r also in a Research Mode as of today!.


August 3, 2010 - 2:17pm

Forgot to include our environment details.

Version - PRPC 55 SP1 / WebSphere 6.x
Database - ORACLE 10G
Framework - Health Care Industry Framework

May 4, 2011 - 4:04pm

Please contact Pega Support for getting the HotFix. They look at your logs and based on the info they will provide you a Hot Fix.

August 17, 2010 - 2:15pm

I got a HotFix-2881 from Pega Support today. Will update this thread after we deploy the HotFix next month.

August 5, 2010 - 3:27pm

We have a main flow that calls a subflow based on a criteria. When the Subflow is being called PRPC was unable to start the Subflow which is causing this error.

I have opened a Support Request with Pega and so far they are not sure either what is causing this issue.

Now that this is happenning with multiple customers they need to treat this as a high priority issue and provide us a fix.

November 3, 2016 - 7:47am


I am also facing the same issue.I have noticed one of the embedded .pxFlow pages is empty.

I am Using Pega 7.1

Have anyone received a response from SR?