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Is it possible to CRC check a qvw file without date/time mattering?

I would like to do a CRC check on a .qvw, but I do not want the date/time to matter.  In other works I would like to be able to:

  1. Run a CRC check on the qvw file
  2. Make a property change to the qvw file and save
  3. Change the property value back the original and save.
  4. Run the CRC check again on the qvw file and have it match the original CRC since the content is the same.

Is this possible?  I remember being able to do this on an exe file after stripping the date/time information out of the exe.

1 Solution

Accepted Solutions
Gysbert_Wassenaar

You'll find that the file isn't the same file after the changes. I just ran this experiment and calculated and md5sum of both files and these checksums differ after changing and changing back the property.

I think the qvw document contains an internal checksum and this is updated on every save. If you change a single bit somewhere in the qvw file with a hex editor it's very likely you won't be able to open it anymore in Qlikview.


talk is cheap, supply exceeds demand

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2 Replies
Gysbert_Wassenaar

You'll find that the file isn't the same file after the changes. I just ran this experiment and calculated and md5sum of both files and these checksums differ after changing and changing back the property.

I think the qvw document contains an internal checksum and this is updated on every save. If you change a single bit somewhere in the qvw file with a hex editor it's very likely you won't be able to open it anymore in Qlikview.


talk is cheap, supply exceeds demand
korsikov
Partner - Specialist III
Partner - Specialist III

you are wrong

i'm have 1Gb qvw file in FTP

download this Model.qvw file from ftp ~ 10 minutes

at this time publisher reload model.qvw file and upload it into FTP

and as result i'm has one qvw file with start from old model and end with new model.

try open - memory over commit and server freezy