Obsure Quicktime problem between UNC and mapped drives.  Looking for some assistance.

GDavis193
GDavis193 used Ask the Experts™
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We have a client who is having trouble rendering a QT video from a windows server share.  If I have the user use the UNC path it works.  I'm not clear on the technical differences between the two other than one uses a drive letter and one doesn't.  It may be an obscure QT (32 bit wrapper) working with a 64bit product like After FX problem when working with UNC vs mapped drives.  My thought was perhaps it was a WINS issue but since the server is 2003 R2 64b, I thought DNS handled this.

Strangely enough, he can map a drive letter on an XP 64b workstation.

Any suggestions on where I might focus my attention would be greatly appreciated!

Edit: Does enabling WINS help with mapped drives as where UNC doesn't need it?
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Top Expert 2015

Commented:
64XP is a failure on its own
there is little driver support except for server hardware like netcards which is shared with 2003.

I did some further troubleshoot and was able to create a new share on the target device and for some reason, it works there.  Permissions match the old share 100%.  Not sure why this is happening.
Top Expert 2015

Commented:
component at fault is "offline files" which uses some heuristics to cache files locally forever on slow network connections (or if there is some temporary slowdown) disabling it on LAN machines (clients) fixes problem completely

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Commented:
The files that were open range from 50mb to 15gb in size.  althought I can't confirm it as I did not make the change myself, the client told me that toggling offline files did not make a difference.  Unless manually configured, I'm pretty sure 10gb is over the cache size limit.

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