SQL Developer failed to start

Question

I\'ve just installed SQL Developer 4.1.1 64-bit on a Windows Vista machine, in directory c:\\sqldeveloper.

My Java installation is in c:\\program

Answer 1

I ran in to the same problem myself, trying to run SQL Developer 4.1.1 64-bit with JDK on a Windows Server 2008. I've installed SQL Developer many times over the years from 1.x to 4.1.1 and never encountered this until now.

I solved it by copying the MSVCR100.dll file from sqldeveloper\jdk\jre\bin to the sqldeveloper\sqldeveloper\bin folder.

Update 3/18/2017:

In downloading the latest version from Oracle's website, I found this in the installation notes which confirms and explains the issue:

Note: the Windows EXE requires a MSVCR100.dll to run. Most computers will already have this file and in the Windows PATH. However, if the first copy of the file found by the EXE is a 32-bit copy of the DLL, then SQL Developer will fail to start. You can fix this by copying a 64-bit version of the DLL into the BIN directory or updating your OS PATH such that a 64 bit copy of the DLL is found first.