The documentation for the "Perform Script on Server" script step at FileMaker Pro 15 Help has incorrect information in it.
For example #1, the script parameter contains 3 values separated by semicolons. These values are later grabbed using the GetValue command. However, this will not work properly because the values must be separated by carriage returns, not semicolons, in order for the GetValues command to recognize the different values. Please fix, thank you!
p.s. Please open up the documentation as a Wiki to the developer community... there are just way too many errors and omissions in the documentation to make it a truly useful or reliable resource for developers.