error compiling on BL2120 PGDCRShadow

hi all, i receive:

line 8041 : ERROR RS232.LIB : Undefined (but used) global label PGDCRShadow

what function requires these variable?

How can i define it??

Thanks all!

Hi all, i founded that i had leaved two rows into the code coming from LP3500 code and those instructions called the definition variables of two serial ports that are undifined under BL2120
SSorry for the useless tread.

code:

        case 'E':
        		serEopen(baud);
            serEparity(parita);
            if ( bits == 8 ) serEdatabits( 0x00);
            else serEdatabits( 0x01 );
				serEwrFlush();
				serErdFlush();
			 	break;
         case 'F':
        		serFopen(baud);
            serFparity(parita);
            if ( bits == 8 ) serFdatabits( 0x00);
            else serFdatabits( 0x01 );
				serFwrFlush();
				serFrdFlush();
			 	break;