I am getting the this error when I “Run All Tests” however the error disappears when I run test for individual classes. With All Tests most of the classes give same error.

*Error Details *

Error Message System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, trgOrphanId: execution of AfterInsert

caused by: System.QueryException: Record Currently Unavailable: The record you are attempting to edit, or one of its related records, is currently being modified by another user. Please try again.

Trigger.trgOrphanId: line 23, column 1: [] Stack Trace Class.testBatchDonorAllocation.myUnitTest: line 39, column 1

Attribution to: Mahmood

Possible Suggestion/Solution #1

In Setup's "Apex Test Execution" page there is an "Options" button that includes a "Disable Apex Parallel Testing" checkbox. Checking that will probably avoid the problem.

Attribution to: Keith C
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