If you recently took the update to Java 8 on your WinPOS and your cash drawer suddenly stopped opening, the following files need to be added to the Java 8 file. When the computer updated from Java 7 to Java 8, the java 7 files was removed and these files are needed to open the cash drawer and are no longer available
Follow these steps to add the three files to your java 8 file
1) Navigate to your C: Drive on your WinPOS. There you will find your Program Files folder, then to your Java folder.
Once you are in the Java Folder:
a. Place the win32com.dll (File below) into C:\Program Files\Java\jre1.8.0_91\bin folder
b. Place the comm.jar (File below) into C:\Program Files\Java\jre1.8.0_91\lib\ext folder
c. Place the javax.comm.properties (File below) into C:\Program Files\Java\jre1.8.0_91\lib folder
2) Once added logout of the POS and close the application, then you reopen the app and verify it works by pressing the Cash Drawer button under Management Tab and it should work.
win32com.dll, and comm.jar will tell you that these files can harm your computer do you want to "Keep" or "Disregard". Press Keep and add the files to the correct locations.