DBIF_RSQL_SQL_ERROR with Exception CX_SY_OPEN_SQL_DB user PIAFUSER

Hi Friends,

We are facing a issue in our ECC Production system , getting too many dumps with DBIF_RSQL_SQL_ERROR with Exception CX_SY_OPEN_SQL_DB user PIAFUSER.
please find the belwo error detals.

Runtime Errors DBIF_RSQL_SQL_ERROR
Exception CX_SY_OPEN_SQL_DB

Short text
SQL error in the database when accessing a table.

User................ "PIAFUSER"
Language Key........ "E"
Program............. "/DIGOFF/CL_HR01_ARB_AVT_EXT===CP"

Database error text........: "SQL0302N The value of a host variable in the
EXECUTE or OPEN statement is too large for its corresponding use.
SQLSTATE=22003 row=1"
Internal call code.........: "[RSQL/INSR//DIGOFF/ARB_AVT ]"
Please check the entries in the system log (Transaction SM21).

Information on where terminated
Termination occurred in the ABAP program "/DIGOFF/CL_HR01_ARB_AVT_EXT===CP" -
in "/DIGOFF/IF_HR01_ARB_AVT_EXT~CREATE_ARB_AVTALE".
The main program was "SAPMSSY1 ".

In the source code you have the termination point in line 36
of the (Include) program "/DIGOFF/CL_HR01_ARB_AVT_EXT===CM001".
The termination is caused because exception "CX_SY_OPEN_SQL_DB" occurred in
procedure "/DIGOFF/IF_HR01_ARB_AVT_EXT~CREATE_ARB_AVTALE" "(METHOD)", but it
was neither handled locally nor declared
in the RAISING clause of its signature.

The procedure is in program "/DIGOFF/CL_HR01_ARB_AVT_EXT===CP "; its source
code begins in line
1 of the (Include program "/DIGOFF/CL_HR01_ARB_AVT_EXT===CM001 ".

sm21 log details:

09:36:45 DIA 000 820 PIAFUSER BY 4 Database error -302 at INS access to table /DIGOFF/AR
09:36:45 DIA 000 820 PIAFUSER BY 0 > SQL0302N The value of a host variable in the EXECUTE or OPE
09:36:45 DIA 000 820 PIAFUSER BY 0 > statement is too large for its corresponding use.
09:36:45 DIA 000 820 PIAFUSER BY 0 > SQLSTATE=22003 row=1
09:36:45 DIA 000 820 PIAFUSER AB 0 Run-time error "DBIF_RSQL_SQL_ERROR" occurred
09:36:45 DIA 000 820 PIAFUSER AB 1 > Short dump "120912 093645 dap-dof- erp01_EP1_00" generated

can you please suggest me , how to solve this issue.

regards,
balaram