error in bascom code

$large
Dim Addr As Byte
Dim Datain[addr] As Byte
Dim T As Byte
Dim F As Integer
Dim G As Byte
Dim S As Integer
Dim In As Byte
Dim Ind As String * 1

P2 = 255

$baud = 9600

P3.7 = 0
P3.6 = 0
P3.5 = 0
P3.4 = 0

Cls
Cursor Off
Lcd " Zigbee Based"
Lowerline
Lcd "Ind.Automation"
Wait 2

Cls
Lcd "S.E.S.G.O.I.F.E "
Lowerline
Lcd " "
Wait 2

Cls
Lcd "Guided Byrof: "
Lowerline
Lcd "Dr.Alam Shaikh "
Wait 2

Do

For Addr = 0 To 3

P1 = Addr
Waitms 1
P1.3 = 1
Waitms 1
P1.3 = 0
Waitms 1

Datain[addr] = 0

If P2.0 = 1 Then
Datain[addr] = Datain[addr] + 128
End If
If P2.1 = 1 Then
Datain[addr] = Datain[addr] + 64
End If
If P2.2 = 1 Then
Datain[addr] = Datain[addr] + 32
End If
If P2.3 = 1 Then
Datain[addr] = Datain[addr] + 16
End If
If P2.4 = 1 Then
Datain[addr] = Datain[addr] + 8
End If
If P2.5 = 1 Then
Datain[addr] = Datain[addr] + 4
End If
If P2.6 = 1 Then
Datain[addr] = Datain[addr] + 2
End If
If P2.7 = 1 Then
Datain[addr] = Datain[addr] + 1
End If

If Addr = 0 Then
T = Datain[addr]
Elseif Addr = 1 Then
F = Datain[addr]
Elseif Addr = 2 Then
G = Datain[addr]
Elseif Addr = 3 Then
S = Datain[addr]
End If

Next

Print "M1" ; T;
Print "M2" ; F;
Print "M3" ; G;
Print "M4" ; S;

Cls
Locate 1 , 1
Lcd "T=" ; T ;
Locate 1 , 9
Lcd "F=" ; F ;
Locate 2 , 1
Lcd "G=" ; G ;
Locate 2 , 9
Lcd "S=" ; S ;

In = Inkey

If In = "A" Then
P3.7 = 1
End If

If In = "B" Then
P3.6 = 1
End If

If In = "C" Then
P3.5 = 1
End If

If In = "D" Then
P3.4 = 1
End If

If In = "E" Then
P3.7 = 0
P3.6 = 0
P3.5 = 0
P3.4 = 0
End If

Waitms 250
Loop







Plz help me in solving error in above code

What does this line Dim Ind As String * 1 do? Comment out this line and compile.

I assume you would like to use array.
Dim Datain[addr] As Byte this is invalid syntax.
Dim Datain(10) as byte is for 10 byte array.

for Addr = 1 to 10
Datain(addr) = inkey
next

I do not see config for serial port so I assume you are setting this in the IDE.
Typicaly I would see inkey() function with your serial port # inside like Inkey(#1) etc.