I am continuing to struggle with some code that compiles and runs as intended using gpc-20020502 based on gcc 2.95.2 that I am now trying to get it running with gpc-20060325 based on gcc-3.4.4. It appears the packing of records has changed. The following test program produces different answers with the different compilers Program mltest06; Const MaxName=49; MaxClas=40; MaxChel=120; Type TCompr=Packed Record Name:String(Maxname); Class:1..Maxclas; Awel:Set of 1..MaxChel; Rlate,Rtime:Integer; RetirementControl:Integer; PerformanceIndex:Integer; END; Var Compr:TCompr; Begin Writeln('Size of Compr =',Sizeof(Compr)); Writeln('Size of Compr.Name =',BitSizeof(Compr.Name)); Writeln('Size of Compr.Class =',BitSizeof(Compr.Class)); Writeln('Size of Compr.Awel =',BitSizeof(Compr.awel)); Writeln('Size of Compr.Rlate =',BitSizeof(Compr.Rlate)); Writeln('Size of Compr.Rtime =',BitSizeof(Compr.Rtime)); Writeln('Size of Compr.RetirementControl=',BitSizeof(Compr.RetirementControl)); Writeln('Size of Compr.PerformanceIndex =',BitSizeof(Compr.PerformanceIndex)); End. 20020502 20060325 Size of Compr =91 96 Size of Compr.Name =464 480 Size of Compr.Class =6 6 Size of Compr.Awel =128 128 Size of Compr.Rlate =32 32 Size of Compr.Rtime =32 32 Size of Compr.RetirementControl=32 32 Size of Compr.PerformanceIndex =32 32 Is there a command line option for gpc to obtain the previous behaviour with the newer version? -- Martin Liddle, Tynemouth Computer Services, 3 Kentmere Way, Staveley, Chesterfield, Derbyshire, S43 3TW. Web site: <http://www.tynecomp.co.uk>.