JVM COBOL - Error 119 Name not unique

Hello,

I am calling a cobol program, from a Java servlet.

I can successfully run the cobol program, but if I display a JSP, and then try to invoke the program again, I get the following exception:

com.microfocus.cobol.program.COBOLRuntimeException: 119     Name is not unique 

This is how I am invoking the program…

private Boolean STAGE_1 (StateLinkage sl, IRunUnit runUnit, HttpServletRequest req, HttpServletResponse res)
{
boolean successFlag = false;

AMSC535A pgm = new AMSC535A();
Amsc535aParms AMSC535Aparms = new Amsc535aParms();
runUnit.Add(pgm);

int GCSrc = pgm.AMSC535A(AMSC535Aparms);


if ( GCSrc < GCS_WARNING )
  { successFlag = true; }

return successFlag;
}

Could someone advise me on how to fix this please.