When SQL Developer 4.0 is started, the following error occurs: "unable to create an instance of the j

After Oracle is installed, the first thing to do is to think about how to connect and proceed. SQL Developer is a powerful tool officially provided. In my opinion, it is also the first choice. The latest version on the official website is 4.0.1.14.48. After downloading it, you are eager to try it out. Run the downloaded package and run the sqlcmd.exe file directly. After selecting the JDK path installed locally, an error is reported, indicating "unable to create an instance of the java virtual machine located at path". the interface is as follows:


The solution is as follows: Find the configuration directory of sqldeveloper, Which is XP, path: C: \ Documents and Settings \ Administrator \ Application Data \ sqldeveloper \ find the file product under the directory. conf, the absolute path on my computer is: C: \ Documents ents and Settings \ Administrator \ Application Data \ sqldeveloper \ 1.0.0.0.0 \ product. conf open the file and change the option AddVMOption-Xmx800m to AddVMOption-Xmx512m.
Then start sqlcmd.exe again and run it successfully.