FCC Receiver Error :Column value ' ' too long

Hi Experts

I am getting data from SAP for which i should create a file which is fixed length on the target side

My structure is :

File----

----->Header --- -

-

>RecordType

-

>Transcode

-

>PO_Num

-

>Vend_ID

-

>Crea_date

-

>WHS_ID

-

>POM_Status

-

>Cancel_date

-

>Delv_date

-

>Ord_type

-

>POM_Char

---- >Record_Detail ---1..Unbound

-

>Record_typ

-

>PO_Num

-

>Line_no

-

>Itm_no

-

>Sch_No

-

>QTY

-

>UOM

-

>Vend_itm_no

-

>Delv_Date

-

>Buyer_name

-

>WHS_ID

---- >var1 -0..1

---- >var2 -0..1

var1 and var2 I am using for variable substitution.

I have configured the receiver FCC as below

Record Structure HeaderRecord,Record_Detail

HeaderRecord.fieldFixedLengths 1,1,30,10,8,2,1,8,8,8,1

Record_Detail.fieldFixedLengths 1,30,5,30,3,8,2,20,8,25,2

And I have given var1 and var2 in varaible substitution.

But I am getting the following error when recevier receiving the file

Could not process due to error: java.lang.Exception: Exception in XML Parser (format problem?):'java.lang.Exception: Message processing failed in XML parser: 'java.lang.Exception: Column value '0811200613.WAPONUM' too long (>1 for 0. column) - must stop', probably configuration error in file adapter (XML parser error)'

Please help me

Regards

Sowmya