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Mac finder error copy -50 fix?

I keep getting a finder copying error (-50) while copying a 7.56 gb file from a external hard drive of 80gb formatted for Mac os extended (Journaled) at stops copying at 346MBs please help I really need to copy this file!

iBook, Mac OS X (10.4.2), iBook g4 2005

Posted on Jul 13, 2012 1:42 PM

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Posted on Jul 13, 2012 1:51 PM

Hi Lester, here's what I have notes on that error...


enum {

paramErr = -50, /*error in user parameter list*/

Which could be a bad filename or other problem like an unacceptable character for the OSes involved or File transfer method, say like from an AFS backup/disk to an FAT32/MS-DOS Disk using SMB.


Sometimes it just means a Disk or Network problem.


http://support.apple.com/kb/TA20831


http://support.apple.com/kb/TA20948?viewlocale=en_US


http://support.apple.com/kb/TA22339?viewlocale=en_US


Have you used Disk Utility to just Verify Disk on both, (not Verify Permissions)?

43 replies
Question marked as Best reply

Jul 13, 2012 1:51 PM in response to Lester1234

Hi Lester, here's what I have notes on that error...


enum {

paramErr = -50, /*error in user parameter list*/

Which could be a bad filename or other problem like an unacceptable character for the OSes involved or File transfer method, say like from an AFS backup/disk to an FAT32/MS-DOS Disk using SMB.


Sometimes it just means a Disk or Network problem.


http://support.apple.com/kb/TA20831


http://support.apple.com/kb/TA20948?viewlocale=en_US


http://support.apple.com/kb/TA22339?viewlocale=en_US


Have you used Disk Utility to just Verify Disk on both, (not Verify Permissions)?

Mac finder error copy -50 fix?

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