Problems with detection of R and with StopRCallerOnline()

[tomgrille]

Hi,

my problem seems to be that my R installation, which is not located in C:\Program Files, is not recognized properly. I found a way to make RCaller work, defining the location of R via RCallerOptions, but now i can't terminate my R process anymore, as StopRCallerOnline() throws an exception. So here are the details:

When I try to recreate an example the line RCaller caller = RCaller.create(); throws the following exception:

Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.github.rcaller.rstuff.RCallerOptions.create(RCallerOptions.java:32)
	at com.github.rcaller.rstuff.RCaller.create(RCaller.java:83)
	at OnlineTest.main(OnlineTest.java:24)
Caused by: java.lang.NullPointerException
	at java.base/java.util.Arrays.sort(Arrays.java:1249)
	at com.github.rcaller.util.Globals.<clinit>(Globals.java:65)
	... 3 more

When I used RCaller like 2 years ago, the function Globals.setRPaths(String,String) helped, but this seems to exist no more. So I found the following solution that works

String pathToRScript = "E:\\R\\R-3.5.1\\bin\\Rscript.exe";
String pathToR = "E:\\R\\R-3.5.1\\bin\\R.exe";
RCallerOptions options = RCallerOptions.create(pathToRScript, pathToR, FailurePolicy.RETRY_1, 3000l, 100l, RProcessStartUpOptions.create());
RCaller caller = RCaller.create(options);

This makes the examples work, but when I use runAndReturnResultOnline(), I can't terminate the R process, as StopRCallerOnline() throws the following similar exception:

Exception in thread "main" java.lang.ExceptionInInitializerError
	at com.github.rcaller.rstuff.RCaller.StopRCallerOnline(RCaller.java:324)
	at OnlineTest.main(OnlineTest.java:42)
Caused by: java.lang.NullPointerException
	at java.base/java.util.Arrays.sort(Arrays.java:1249)
	at com.github.rcaller.util.Globals.<clinit>(Globals.java:65)
	... 2 more

Also everything I try to do with Globals produces a similar ExceptionInInitializerError, caused by an NullPointerException at the same location:

Globals.detect_current_rscript();
System.out.println("R_current:" + Globals.R_current);
System.out.println("R_Win:" + Globals.R_Windows);
System.out.println("RScript_Win:" + Globals.RScript_Windows);
Globals.R_current = "E:\\R\\R-3.5.1\\bin\\R.exe";
Globals.Rscript_current= "E:\\R\\R-3.5.1\\bin\\Rscript.exe";

Any help is appreciated.

[jbytecode]

@tomgrille is this issue resolved or are there any code improvements for this?