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Does Windows Desktop Search still index notebooks?

Vincent Virgilio
Posted 6 years ago

At some point in the past years I was able to find notebook content via Windows Desktop Search (WDS). Recently I've had trouble with this (null results searching for content and "ext:nb"). I checked WDS Indexing Options, and found a problem with file extensions "cdf", "nb", "nbp": "Registered IFilter is not found". Extensions "m", "ma", and "wl" appear to not have such a problem, with WDS reporting "Plain Text Filter". I notice this after a clean install of both v11.3 and v12.

If the relevant IFilters are indeed installed on my system, perhaps my company's IT security policies are preventing their proper registration. I ran the installers as admin, but perhaps that wasn't enough.
POSTED BY: Vincent Virgilio
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Yes that is true. However this shortcut did help me looking into the notebooks. A custom iFilter should make things better. Going through the extension and their filters it seems only the standard txt filter is used. No idea if Wolfram research is designing a custom filter.

POSTED BY: l van Veen

Thank you, I'll try this. However, I expect it to be a little less efficient, as it'll search the entire notebook contents, which include images, compressed data, etc. I'd think an iFilter designed for notebooks would skip over such content.
POSTED BY: Vincent Virgilio

It's very annoying but I found a fix with up to now no side effects. It seem that the .nb extension has no iFilter driver linked. I believe this could just be the standard .TXT. Windows 10 and MM12.o You can start regedt32 from the windows run prompt. Go to the Computer\HKEYLOCALMACHINE\SOFTWARE\Classes.txt\PersistentHandler Double click on the Default item and copy the GUID in my case as an example: {5e941d80-bf96-11cd-b579-08002b30bfeb}

Go to the Computer\HKEYLOCALMACHINE\SOFTWARE\Classes.nb\PersistentHandler Double click on the Default item and Paste the GUID from the .txt (In my case there was no GUID entry in the Default entry which I guess triggers the "not registered message"..?)

That's it and it worked for me. Would love to hear official Support statement from Wolfram though.. I also noted that for the .m and .ma files the same entries are used and these already worked as already explained by the OP.
POSTED BY: l van Veen
Muhammad Ali
Muhammad Ali
Posted 6 years ago

Can someone tell me how can I just use Plain Text IFilter with nb format? Since I am also getting Registered IFilter is not found. I am fine with just using a plain text filter but don't know how to associate the plain text filter with nb format.
POSTED BY: Muhammad Ali
Holger Beruda
Holger Beruda
Posted 6 years ago
POSTED BY: Holger Beruda

Spelunking on StackExchange suggests WDS capability was lost back around v10.2. It is a painful loss.

POSTED BY: Vincent Virgilio

I have just noticed I have the same problem. Windows 10 and Mathematica 12.
POSTED BY: Ignacy Wolak-Sawicki
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