why do i have bug with [Can't open File]

I can run your code without any errors. My guess is either that the file c:\-r76\db_stuff.bin doesn't exist or that you don't have access to write to the disk. e.g. if you're on a network, you might not have access to write files on C:

other than that, I don't know why your code throws an error at you!

Hmz.. I forget to told, taht i have bug with ..!!

I can add data and print data on screen! but when i start this process again.. to add new data to file *.bin!

all data is been erased and i can save just the last data entry!

why?

i had to get such a result:
Number 1.
Name sjkhdj
surname lkss
....

Number 2
Name jdewh
Surname kjxhid
....

Number 3
Name jdesdesd
Surname kjsdfsfe
....

etc.

Can you tell me where is a problem?

I have this error:
1. File does not exist.

cn you tell how to solve this?

Ok, I've made a few changes to your code... At two points you started the procedures (Make_Rec and Print_Rec) by closing a file (fails), I moved those line to the end of the procedures instead. And I think it works fine now!
(I would have posted this as an answer if I it were'nt already locked!)


Take a look at it, Does it work like you wanted it to do?

Program donors_app;
Uses Crt;

Const
  db_stuff = 'e:\program\pascal\test2.pas';           {faila atrash. vieta}
  Name_signs = 15;                             {varda garums simbolos}
  SurName_signs = 25;                          {SurVaarda garums simbolos}
  Vec_signs = 3;
  n = 100;                                     {ierakstu skaits (max) }

Type
 donors = record
   Name: string[Name_signs];                   {Vards 15 simb. gars}
   SurName: string[SurName_signs];             {SurVaards 25 simb. gars}
   RegNum: integer;                            {Reg. Numura garums 8 simb.}
   Vecums: String[Vec_signs];                  {Vecums 0 - 150}
   Dzimums: string[4];                            {dzimums - vir./siev.}
End;


FFile = file of donors;                 {faila tips}
rec = array[1..n] of donors;            {masivu tips, pec faila tipa glab.}

var fails: FFile;                       {failam dotais nosaukums}
    kop_rec: integer;                   {kopejo ierakstu skaits}


Function Pareizs_REC(i:integer):boolean;   {parbauda vai eksistee ieraksts}
var g: rec;                                {ierakstu skaits}
    j:integer;                             {skaita ierakstus}
begin
 j:=1;                                     {ierkast nr. 1}
 Pareizs_Rec:= true;                       {ieraksts eksitee}
 {$I-}
 Close(fails); {}                          {aizver failu}
 {$I+}
 Assign(fails,db_stuff);                   {faila/lokacijas asigneshana}
 Reset(fails);                             {izdzeshana}
 While ((Eof(fails))<>true) do
   begin
     read(fails,g[j]);                     {nolasa no faila j-to iekatu}
     inc(j);                               {noapalo j, lai naf bugu}
   end;
 if i+1>j then Pareizs_REC:=false;         {parbauda vai eksiste nakamais ieraksts}
End;

Procedure MakeRec;                             {recordu veidoshana}
var g: rec;
    Y: char;   s,temp: string;   ok: boolean; a,i,b,rez:integer;
      TempSTR,chose: String;  Code,TempG: Integer;
      Label 12; Label 13;
Begin
{$I-}
Assign(fails,db_stuff);
Reset(fails);
If IOResult <> 0 then Rewrite(fails); {}
Seek(fails,FileSize(fails));                    {meklee faila beigas}
inc(kop_rec);
ClrScr;
Writeln('Pec neprecizas vertibu ievadishanas, tas bus jaaievada atkartoti!');
GotoXY(3,22);
Write('-press enter-'); Readln;
ClrScr;
Writeln('Ievadiet personas vardu - ',Name_signs,' simboliem');
GotoXY(3,22);
Write('-ievadiet- ');
ReadLn(g[kop_rec].Name);           {ieglabaa masivaa name}
ClrScr;
Writeln('Ievadiet personas uzvardu - ',SurName_signs,' simboliem');
GotoXY(3,22);
Write('-ievadiet- ');
ReadLn(g[kop_rec].SurName);                        {ieglabaa masivaa SurName}

ClrScr;                                            {izveido reg numuru}
Writeln('reg-num tiks noteikts automatiski');
GotoXY(3,22);
Write('-press enter-');
ReadLn;
 Randomize;
    rez := Random(9999);
    if rez<=1000 then rez:=rez+1000;
 ClrScr;
    Write('Jusu registracijas numurs--> ', rez);
    GotoXY(3,22); Write('-press enter-');
    g[kop_rec].RegNum := rez;
readln;

ok:=false;
While ok <> true do                      {ievadam datus -vecums}
begin
13: ClrScr;
    Writeln('Ievadiet personas vecumu: ');
    GotoXY(3,22); Write('-ievadiet- ');
    ReadLn(temp);
      begin
       a:=0;
        for i:=1 to length(temp) do begin
         if (ord(temp[i])>=48) and (ord(temp[i])<=57)
          then b:=1  {ASCII kodaa sk}
        else a:=a+1;
     if a>=1 then goto 13
       else ok:=true;
       g[kop_rec].vecums:=temp;
  end;
 end;
end;

Repeat                       {parbauda ievadisha par siev/vir}
   ClrScr;
    Writeln('Izvelas vajadzigo: [0-Siev/1-Vir]');
    GotoXY(3,22); Write('-ievadiet- ');
      ReadLn(TempSTR);
      Val(TempSTR,TempG,Code);
    Until ((Code = 0) And (TempG In [0..1]));
       if tempStr = '1' then chose:='vir.';
       if tempStr = '0' then chose:='siev.';
      g[kop_rec].Dzimums:=chose;
ClrScr;
Writeln('Saglabat datus failaa?  [Y/N]');
GotoXY(3,22); Write('-izvele- ');
readln(Y);
if (Y = 'Y') or (Y = 'y') then write(fails,g[kop_rec]);
close(fails);
{$I+}
End;

Procedure PrintRec;
var g: rec;
i,j: integer;
Begin
ClrScr;
{$I-}
Assign(fails,db_stuff);
Reset(fails);{}
i:=1; j:=0;
While ((Eof(fails))<>true) do
 begin
   inc(j);
   Read(fails,g[i]); {}
   Writeln('nr:             ',i);
   Writeln('name:           ', g[i].name);
   Writeln('surname:        ', g[i].surname);
   Writeln('reg nr:         ', g[i].regnum);
   Writeln('vecums:         ', g[i].vecums);
   Writeln('dzimums:        ', g[i].dzimums);
   writeln;
 end;
readln;
Close(fails);{}
{$I+}
End;


begin
MakeRec;
PrintRec;
end.