Sorry if this is a repost but we are experiencing and issue with DCI history corruption. We have a script which will update a custom attribute and the DCI will return the latest value of the CustomAttribute.

DCI: Param=Dummy, Origin=Internal, DataType=String, Interval=60 Seconds, Transformation (no delta);
return GetCustomAttribute($node,"PacketLossMaxName");

The last value is showing correctly, other historical records are showing mostly null type entries with some showing incorrect date and/or values.

Regards

Aron