Error generating the task form

Question

I had created a nice reusable 2010 workflow in SharePoint Designer. It operates on a content type. The workflow had some custom infopath forms included and a bunch of variables.

Recently I ran into the error where it says that

"SharePoint Designer encountered an error generating the task form".

No matter what I do: create a custom task process, approval or feedback process: I cannot publish the workflow anymore. Here is what I have done:

• Deleting the associated task list won't work.
• I have started from scratch and cannot publish a new workflow anymore either.
• Created a workflow on the list itself instead of content type: this doesn't work either.
• Tested an approval workflow on another list: same problem (see screenshot)
• I have tested a similar workflow in another site collection and this works without any problems.

How to solve this?

Answer 1

To Solve this issue activate the SharePoint 2007 Workflows Feature using the following steps:

1. Open the problem site collection in Browser.
2. Click on Site Actions > Site Settings > Site collection features.
3. Activate the feature called SharePoint 2007 Workflows.
4. Open the problem site collection in SharePoint Designer 2010.
5. Open the problematic workflow and try to publish again.

for more information please go to this link.

Answer 2

Try to use this tool to remove your unavailable workflow feature from content database http://featureadmin.codeplex.com/

As provided in this answer here

Hope it helps!

Answer 3

Look for a field called Predecessors in Task Form Fields. In SharePoint Designer 2010 this field is added using existing site column.

Remove the Field Predecessors from Task Form Fields & again publish the workflow. It should published successfully.

Try to use below KB article to resolved same issue if still persist: https://support.microsoft.com/en-us/kb/2572518

Answer 4

Try to disable and enable infopath form service.

Or

Sometime sharepoint can't fully associate content type to your list internally, So you have to manually associate content type to list for do this

Go to each list where you applied content type and used in workflow.

Go to List Setting -> Advance setting -> enable Allow management of content types and click ok

Now you have List Setting page opens and you have list of content type that is associated with list, Now just click on content type

Answer 5

Since the workflow can be published elsewhere, perhaps it's a local issue. Have you tried clearing SharePoint Designer's cache?

1. Close SPD2013
2. Delete everything at %USERPROFILE%\AppData\Local\Microsoft\WebsiteCache
3. Delete everything at %APPDATA%\Microsoft\Web Server Extensions\Cache
4. Go to SPD2013 options –> General –> Application Options –> Uncheck the “Cache site data across SharePoint Designer sessions”
5. Relaunch SDP

from: http://blah.winsmarts.com/2015-3-Clear_SharePoint_Designer_2013_Cache.aspx

This has solved several "odd" issues for me relating to SharePoint Designer Workflows previously.