I put in some time researching the issue and found the answer.
Because of a bug in the code, the ability to import XLS to add new activities will fail with ERROR: control_updates_flag is null for TASK ActivityID: XXX. This is outlined in Bug 13842293 - CANNOT IMPORT XLS INTO P6 R8.2
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11 years 10 monthsI am having same problem in
I am having same problem in P6 r8.2 .. please help me
ERROR: control_updates_flag is null for TASK ActivityID:
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13 years 7 monthsI put in some time