<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>I have two almost identical programs, but one of them I cannot compile with Win64, but it works fine with Win32. <o:p></o:p></p><p class=MsoNormal>I finally figured out that the difference between the two that seemed to make a difference was the working one had constants defined, the one with issues, those constants were changed to variables.<o:p></o:p></p><p class=MsoNormal>I’ve managed to reduce it down to the offending line and made some test programs that demonstrate the issue:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This program runs fine with both Win32 and Win64:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Const<o:p></o:p></p><p class=MsoNormal> BYA=5;<o:p></o:p></p><p class=MsoNormal> SYA=10;<o:p></o:p></p><p class=MsoNormal>Var<o:p></o:p></p><p class=MsoNormal> LY:word;<o:p></o:p></p><p class=MsoNormal>Begin<o:p></o:p></p><p class=MsoNormal>LY:=Round(30-(BYA+SYA)); <o:p></o:p></p><p class=MsoNormal>End.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This program will only compile with Win32. With Win 64 I get:<o:p></o:p></p><p class=MsoNormal>testit.pas(7,5) Error: Can't determine which overloaded function to call.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Var<o:p></o:p></p><p class=MsoNormal> LY:word;<o:p></o:p></p><p class=MsoNormal> BYA,SYA:Byte;<o:p></o:p></p><p class=MsoNormal>Begin<o:p></o:p></p><p class=MsoNormal>BYA:=5;<o:p></o:p></p><p class=MsoNormal>SYA:=10;<o:p></o:p></p><p class=MsoNormal>LY:=Round(30-(BYA+SYA)); //This is the line producing the error, but why?<o:p></o:p></p><p class=MsoNormal>End.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m very confused by this. It’s very clear what to do, and as far as I know, valid syntax.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>If I use <o:p></o:p></p><p class=MsoNormal>LY:=Round(30-BYA-SYA); <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Then it is compiled by both Win32 and Win64 fine. But this is not what I always want to do, I have reasons to want it (30-(BYA+SYA)) the original formula was very long, I reduced it down to this one thing that causes the problem, I really need to be able to group things the way I want to group them.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Strangely:<o:p></o:p></p><p class=MsoNormal>LY:=Round(30.1-(BYA+SYA)); <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also compiles fine with both Win32 and Win64<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am compiling 32bit version with:<o:p></o:p></p><p class=MsoNormal>fpc testit.pas<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>And compilng 64bit verion with:<o:p></o:p></p><p class=MsoNormal>fpc -Px86_64 testit.pas<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any ideas about this?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>James<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>