File Adapter messages stuck in “To Be Delivered” status

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Symptom
You have upgraded to PI 7.0 SP 18 and you notice that File Adapter messages are stuck in “TBDL”(To Be Delivered) status. Additionally, the following symptoms are noticed:
1 – File Adapter stops polling
2 – NullPointer Exceptions are seen in Audit logs
3 – Hanging file adapter locks are visible in the ‘Locking Adapter’ [...]

Error when searching for Import source

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Symptom
Import design objects from server (Tools -> Import Design Objects -> Server). It throws an error dialog with the following information.
Dialog Title: “Error When Searching for Import Source”
Error Message: “Error when executing search”.
Other terms
Import, Import Design Objects, Tpz Import, NullPointerException, Error when executing search, Error when Searching for Import Source, ESR, DIR, [...]

Visual Administrator error messages in Security Provider

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Symptom
You want to make changes in the Security Provider service in the Visual Administrator, but you see error messages such as “Unable to update authentication stack for the selected configuration” or “Unable to modify the authentication stack”. When you click on the status bar you see the following exception:
java.lang.NullPointerException
at java.util.Hashtable$1.contains(Hashtable.java:401)
at java.util.Collections$SynchronizedCollection.contains(Collections.java:1557)
at java.util.Collections$UnmodifiableMap$UnmodifiableEntrySet.contains(Collections.java:1385)
at [...]