How do I fix the 'Point does not exist' error in PI System?

The "Point does not exist" error occurs when PI System can't find a PI tag by name. Here's how to diagnose and fix it.

Common Causes

1. Tag Name Typo

• Double-check the exact tag name including case sensitivity.
• In PI SMT: Points > Point Builder, search for the tag.
• Remember PI tag names are case-sensitive in some contexts.

2. Wrong PI Data Archive

• You may be connected to a different PI server than where the tag exists.
• Verify the server name in your connection string or PI System Explorer.

3. Tag Was Deleted or Renamed

• Check the PI message log for recent tag deletions.
• Use piconfig to search: @table pipoint, @mode list, @select tag=YourTag*.

4. AF Data Reference Misconfiguration

• In AF, the PI Point data reference may have substitution parameters that don't resolve.
• Check %Element%, %..\Element% substitutions in the template.

5. Permissions

• The user/service account may not have read access to the PI point.
• Check PI identities and mappings in PI SMT.

Quick Diagnostic

# In PI SMT or piconfig, verify the point exists:
piconfig> @table pipoint
piconfig> @mode list
piconfig> @select tag=ExactTagName

In Code

// AF SDK - handle gracefully
try
{
    PIPoint point = PIPoint.FindPIPoint(server, "TagName");
}
catch (PIPointInvalidException)
{
    Console.WriteLine("Tag not found on this server");
}