MCH5601 and java String class

I have an rpg program where i am using the java string class. has been working fine until a change i made to call setpoiclass cl to set the path of my java program.  I was able to boil it down to the following addenvvar command in the CL. When i comment it out, the code works fine.

I'm not sure if i need this environment variable at all. We do use scotts POI integration heavily but most of those jobs run in batch and maybe the reason why this has never happened before.

ADDENVVAR ENVVAR(QIBM_USE_DESCRIPTOR_STDIO) VALUE('I') REPLACE(*YES)

Dcl-Pr newString Object(*Java:'java.lang.String') ExtProc(*Java:'java.lang.String':*CONSTRUCTOR);
    *N Varchar(32767) Const;
End-Pr;

args(1)  = newString(datain);   ----- error on this line


Message ID . . . . . . :   MCH5601       Severity . . . . . . . :   40
Message type . . . . . : Escape
Date sent  . . . . . . :   04/21/25      Time sent  . . . . . . :   20:15:38

Message . . . . :   Template value not valid for instruction.
Cause . . . . . :   The location of the value is template  with an offset to
  field in bytes X'0008', an offset in field in bits X'001F', a length of
  field of 4, and an instruction operand number of 1.  The reason code is
  X'0000'. If the reason code is X'0000', a reason code may not be available.


Message ID . . . . . . :   CPFB9C8       Severity . . . . . . . :   40
Message type . . . . . : Escape
Date sent  . . . . . . :   04/21/25      Time sent  . . . . . . :   20:15:38

Message . . . . :   File descriptors 0, 1, and 2 must be open to run the PASE
  for i program.
Cause . . . . . :   When ILE environment variable QIBM_USE_DESCRIPTOR_STDIO is
  Y or I, Integrated File System file descriptors 0, 1, and 2 must be opened
  before calling the Qp2RunPase API to run a PASE for i program.
Recovery  . . . :   Either open file descriptors 0, 1, and 2 or change
  environment variable QIBM_USE_DESCRIPTOR_STDIO, and then try the request
again.