Task Timeline / Gantt troubleshooting

Products

• Clarity PPM SaaS
• Clarity PPM On Premise

Issue/Introduction

Troubleshooting tips and known issues related to the Modern User Experience (MUX  / UX) Task Timeline view and the Gantt in Clarity. Sometimes the issue may be seen in both, while other times, the issue is only in one area.

Resolution

Table of Contents

• Check Clarity Classic Gantt
• If the issue is only in MUX Timeline View
  • Check 'View Options' setting
  • Review Known Issues
• If the issue is only in Classic Gantt
• If the above doesn't help

Does the issue impact the Timeline View, Gantt view, or both? This can help identify the troubleshooting steps needed. 

Check Clarity Classic Gantt

To check if the Gantt is impacted, and for additional details that may aid in troubleshooting:

1. Open the Classic Clarity Gantt for the project. Is the issue reproducible there? 
2. If yes, expand the Gantt Filter and click Show all. Check to see if any of the below errors are generated:
   1. Blank Gantt / missing tasks for a project when PRTASK.WBS_PARSEQ is null
   2. Task Timeline view / Gantt not showing tasks "ERROR: duplicate key value violates unique constraint "temp_wbs_global_session_u1"
   3. Tasks invisible in Gantt due to Unique Constraint Error on TEMP_WBS_GLOBAL_PK

If the issue is only in MUX Timeline View

1. Check the 'View Options' setting

   • Check the 'View Options' setting in the Timeline View to make sure periods are selected. More details are in KB: Timeline view is blank when period is missing from 'View Options'

2. Review Known Issues

• • Milestone tasks not appearing on a project's top bar and task Timeline view
  • Tasks do not keep Indentation on Timeline View - (DE56836 - Impacts 15.8, 15.8.1, 15.9 - fixed in 15.9.1) 
  • Tasks Timeline Error: 'Could not update value.' when you move or resize the 'Duration' column - (DE62069 - Impacts 15.9.3 - Fixed in 16.0 and 15.9.3 patch 1)
  • Task Timeline Gantt bars do not end in the right place when Quarters are selected in MUX - (DE62373 - Fixed in 16.0 and 15.9.3 patch 1)
  • Show Dependencies setting in upgraded saved view is not working (DE63014 - Impacts 15.9.3 and 16.0. Under Review)
  • Modern UX Tasks Timeline View : Could not save the view Error

If the issue is only in Classic Gantt

See the below additional issues:

• Tasks do not display in Gantt view when ID is first attribute
• All tasks not showing up in Gantt when using Firefox (DE54302 is fixed on 15.9 and back-ported to 15.8.1 patch 2)

If the above doesn't help

• Review the app-ca.logs to see if any related errors appear
• Enable Developer Tools in the browser to see if that helps in identifying the cause or an additional error that can be used in troubleshooting. 
• Contact Broadcom support for assistance

Additional Information

Note: The list of articles above is not a full list of KBs, so if a match for your issue isn’t found, it's recommended to also search using the Broadcom support search portal. See Known Clarity issues: Tips in using self service. 

See also

• MUX views / flyouts - master KB of known issues
• Tasks / Assignments - Master KB for known issues
• Clarity frequently reported issues