HSSFR4 utiities

Scott/RPG team,

We have been using HSSFR4 utiities for a long time without any problem and
all of a sudden we see following errors intermittently meaning sometime
it works sometimes it doesn't
...
Message ID . . . . . . : RNX0301
Date sent . . . . . . : 07/23/19 Time sent . . . . . . : 10:21:37

Message . . . . : Java exception received when calling Java method.

Cause . . . . . : RPG procedure SS_OPEN in program USERUL/HSSFR4 received
Java exception "java.lang.IllegalArgumentException: Your InputStream was
neither an OLE2 stream, nor an OOXML stream" when calling method "create"
with signature
"(Ljava.io.InputStream;)Lorg.apache.poi.ss.usermodel.Workbook;" in class
"org.apache.poi.ss.usermodel.WorkbookFactory".
Recovery . . . : Contact the person responsible for program maintenance t
determine the cause of the problem.
Technical description . . . . . . . . : If the exception indicates that th
Java class was not found, ensure the class for the method is in the class
path. If the exception indicates that the Java method was not found, check
10:24:04 AM

Message ID . . . . . . : RNX0301
Date sent . . . . . . : 07/23/19 Time sent . . . . . . : 10:32:37

Message . . . . : Java exception received when calling Java method.

Cause . . . . . : RPG procedure SS_OPEN in program USERUL/HSSFR4 received
Java exception "java.io.IOException: System call error number 3004.■" when
calling method "create" with signature
"(Ljava.io.InputStream;)Lorg.apache.poi.ss.usermodel.Workbook;" in class
"org.apache.poi.ss.usermodel.WorkbookFactory".
Recovery . . . : Contact the person responsible for program maintenance to
determine the cause of the problem.
Technical description . . . . . . . . : If the exception indicates that the
Java class was not found, ensure the class for the method is in the class
path. If the exception indicates that the Java method was not found, check
the method name and signature. If the signature is not correct, change the

Regards