SAP Adobe form getting error when printing QRCODE

Dear experts,

In my program i called Adobe forms.

In the interface I pass below code

DATA: lv_nl TYPE string,

       lv_n1 TYPE xstring,

       lv_t1 TYPE xstring,

       lv_tb TYPE string.

lv_n1 = '13'.

lv_t1 = '09'.

BREAK-POINT.

CALL FUNCTION 'CACS_CONVERT_HEX_TO_STRING'

   EXPORTING

     xstring = lv_n1         " <== Your value here

   IMPORTING

     cstring = lv_nl.

CALL FUNCTION 'CACS_CONVERT_HEX_TO_STRING'

   EXPORTING

     xstring = lv_t1           " <== Your value here

   IMPORTING

     cstring = lv_tb.

CONCATENATE gv_sc gv_po1 gv_pa1 lv_nl gv_in1 lv_tb gv_exdat.

I am getting an error

Exception       SYSTEM_ERROR

Message ID:          FPRUNX                     Message number:           001

Message:

ADS: com.adobe.ProcessingException: com.adobe.Processin(200101)

Kindly check and suggest me .

Gopi