it could be a memory leak. Are you using C# to instantiate Excel? It could
be that memory isn't being correctly released.
Take a look at your Task Manager as see if any processes are using memory
excessively. Are the Excel / Outlook apps showing in Processes but not
visible in Applications

Are your ActiveX controls working correctly ... relesing memeory etc


"Brett" wrote in message
...
What causes this please? Looking at obvious possible resources, I have a
modern laptop with 4Gb memory, 32Gb solid state drive (75% full and
recently
defragged).
I get this every now and again when working with ActiveX controls and
userforms, but nothing seems to change (display wise). It just (seems to
be)
an irritating message. Brett