global not created after updating to v.8.1

Hi,

I have a blank app created in v8.0 , there is some codes that you don’t need to change after months and years. After updating to v8.1 and generating all apps this code doesn’t work anymore.
After 1 day of seraching what happend, I found that the global variable [nres] is not listed in Global Variables sections
SC development team, please be carefull !!!
Thanks
Nac
[SIZE=12px]v8.1.022[/SIZE]

Working code in v8.0 but doesn’t work after generating in v.8.1

[m_nres]="";
[m_denroom]="";
[m_nroom]="";
[m_olddatedeb]="";
[m_olddatefin]="";
[m_datedeb]="";
[m_datefin]="";

$idattroom=0;

$mode=substr([nres],0,4);
$nres=substr([nres],4);

but this works !!!

[m_nres]="";
[m_denroom]="";
[m_nroom]="";
[m_olddatedeb]="";
[m_olddatefin]="";
[m_datedeb]="";
[m_datefin]="";

$mtmp=[nres]; // MUST ADD THIS LINE FOR HAVING [nres] in global variables sections

$idattroom=0;

$mode=substr([nres],0,4);
$nres=substr([nres],4);