[Lazarus] Trying to troubleshoot error

[Chris Kelling]

I'm trying to read from a file and populate a stringgrid, and keep 
getting 'Project spares.exe raised an exception class 'External error: 
SIGSEGV' when trying to convert an integer to string.  Running the 
application gets the dialog: Access Violation Press OK to ignore and 
risk data corruption or cancel to kill the program.  Clicking OK brings 
the grid up with the header row populated, and the first field in the 
first non-fixed row (Cells[0,1]) with the proper value, but the rest of 
the table is blank.  I put a try...finally block in and now the IDE 
breaks at the read statement.  Any suggestions?  The code snippet 
follows.

procedure TfrmDashBoard.GetInvExecute(Sender: TObject;
                                        DB : string);
var
   {stockItem type is a record with the following structure:
     recordID    : longint;
     ClassNumber : integer;
     PartNumber  : string;
     Make        : String;
     TypeofEqip  : string;
     Model       : string;
     Description : string;
     quantity    : integer;
     location    : string;
     price       : real;    }

    workspace : Stockitem;
    row       : longint;

begin
      assignfile(inventory,db);
      try
      reset(inventory);
      row := 0;
      while not eof(inventory) do
            begin
                read(inventory,workspace);
                inc(row);
                if db = 'Ops' then
                  with stgInvOps do
                       begin
                            Cells[0,row] := 
inttostr(workspace.ClassNumber);
                            Cells[1,row] := workspace.PartNumber;
                            Cells[2,row] := workspace.Make;
                            Cells[3,row] := workspace.TypeofEqip;
                            Cells[4,row] := workspace.Model;
                            Cells[5,row] := workspace.Description;
                            Cells[6,row] := 
inttostr(workspace.quantity);
                            Cells[7,row] := workspace.location;
                            Cells[8,row] := floattostr(workspace.price);
                       end
                else

thanks.
windows7 32bit, SP1
Lazarus 0.90.30
FPC: 2.4.2
-Chris