Error While Calling ReadActivities On ActivityService Web Service (Doc ID 2676993.1)

Last updated on NOVEMBER 18, 2021

Applies to:

Symptoms

When attempting to call the ReadActivities method on the ActivityService it was noticed that this works for some projects, but fails on other projects.

The error generated is

STEPS TO REPRODUCE
-----------------------
The issue can be reproduced at will with the following steps:
1. Calling the ReadActivities method on the ActivityService web service. For the following activity fields, the Read Activity does not work:

  //ActivityFieldType.BaselineStartDate,
  //ActivityFieldType.BaselineFinishDate,
  //ActivityFieldType.DurationType,
  //ActivityFieldType.PercentCompleteType,
  //ActivityFieldType.LocationName,
  //ActivityFieldType.CalendarName,
  //ActivityFieldType.StartDateVariance,
  //ActivityFieldType.FinishDateVariance,
  //ActivityFieldType.PercentCompleteType,
  //ActivityFieldType.SchedulePercentComplete,
  //ActivityFieldType.UnitsPercentComplete,
  //ActivityFieldType.BaselineDuration,
  //ActivityFieldType.DurationPercentComplete,
  //ActivityFieldType.DurationVariance,
  //ActivityFieldType.MinimumDuration,
  //ActivityFieldType.MaximumDuration,
  //ActivityFieldType.MostLikelyDuration,
  //ActivityFieldType.PlannedDuration,
  //ActivityFieldType.RemainingDuration,
  //ActivityFieldType.AtCompletionDuration,
  //ActivityFieldType.PrimaryResourceName,
  //ActivityFieldType.PrimaryConstraintDate,
  //ActivityFieldType.BaselinePlannedTotalCost,
  //ActivityFieldType.CostPerformanceIndex,
  //ActivityFieldType.SchedulePerformanceIndex,
  //ActivityFieldType.CostPercentComplete,
  //ActivityFieldType.EarnedValueCost,
  //ActivityFieldType.CostVariance,
  //ActivityFieldType.EstimateAtCompletionCost,
  //ActivityFieldType.TotalCostVariance,
  //ActivityFieldType.WBSNamePath,

2. Notice the error

Cause

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