What does this trigger do: Class.zqu.ContactObjectManager.beforeUpdate in Trigger.zqu.ContactTrigger?
Is there knowledge center documentation on what function your triggers on Salesforce Standard objects do? What business rules they are satisfying?
A Before Update Trigger in Salesfoce should not have any side-effects; yet sometimes I get a quote validation error on a Contact Update.
I know the quote validation rule is something we have to fix locally but I am concerned about what your code could be changing in this case. The developer exception error email Salesforce sends me does not provide information on what preceded an error just where the exception was raised and on which object.
It is very hard to have control over what happens in our Salesforce org when a managed package does something unexpected.
Maggie Longshore
Guru
MaggieL