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Home > Frequently Asked Questions > Software > OceanView > MSVCR71.DLL not found

MSVCR71.DLL not found

OceanView is written in Java.  Java (developed and distributed by Sun, now Oracle) has a somewhat contentious relationship with Microsoft Windows.  Not everything always gets installed everywhere it needs to be all the time.  There’s an interesting blog about this particular file has caused  issues with Windows Java installations in the past.

Never to fear!  The simplest solution is just to copy (not move) MSVCR71.DLL from C:\Program Files\Ocean Optics\OceanView\oceanview\_jvm\bin to C:\Windows\system32.  A full troubleshooting procedure follows:

The MSVCR71.DLL file is supposed to be a standard part of Windows.  It should be in the following places (or the equivalent location in your system):

32-bit: C:\Windows\system32\MSVCR71.DLL
64-bit: C:\Windows\SysWOW64\msvcr71.dll

Check to see if the file can be found in the appropriate location for your system.  If not, then this suggests a problem with Windows itself; it was possibly removed with the uninstallation of some software.

If the file is where it is supposed to be, we suggest copying it into the following locations:

C:\Program Files\Ocean Optics\OceanView\oceanview\_jvm\bin
C:\Program Files\Ocean Optics\OceanView\oceanview\bin

This should allow the DLL to be found more easily by Windows.

If you do not find the file in the location specified, please copy it from another computer with the same operating system into the specified location.

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