TEXT to m.lcMyText noshow 0AD0AD0012123AD0012312AD0012341AD00AD0010123 12AD0012123AD0012312AD0012341AD00AD0010123AD0012123AD0012312AD0012341AD00AD001 ENDTEXT lcTemp1 = Sys(2015)+'.txt' lcTemp2 = Sys(2015)+'.txt' ************************** look here *************************** Strtofile(m.lcMytext+'A',m.lcTemp1) *!* lcTemp1 = 'bigfile.txt' && 138Mb *!* lcTemp1 = 'bigfile.tx2' && 26Mb *!* lcTemp2 = 'bigfile.ou2' #Define MAXBUFFER 5 lhIn = Fopen(m.lcTemp1) lhOut = Fcreate(m.lcTemp2) Set Step On Do While Not Feof(m.lhIn ) lcBuffer = Fread(m.lhIn, MAXBUFFER) Do Case Case Right(lcBuffer,3) = 'AD0' Fseek(m.lhIn, -3, 1) lcBuffer = Left(lcBuffer,Len(lcBuffer)-3) Case Right(lcBuffer,2) = 'AD' Fseek(m.lhIn, -2, 1) lcBuffer = Left(lcBuffer,Len(lcBuffer)-2) Case Right(lcBuffer,1) = 'A' Fseek(m.lhIn, -1, 1) lcBuffer = Left(lcBuffer,Len(lcBuffer)-1) Endcase Fwrite(m.lhOut,Strtran(lcBuffer,'AD00','BR77'),MAXBUFFER) Enddo Fclose(m.lhIn) Fclose(m.lhOut) Modify Comm (m.lcTemp2) Erase (m.lcTemp1) Erase (m.lcTemp2)