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[Mort96]

Hello everyone.
I just made this small script in computercraft:

running = true
Door = "nil"

while running == true do

Door = read()

if Door == "exit()" then
  running = false
elseif Door == "1" then
  serialData (1, 0, 0, 0)
end

function serialData (A, B, C, D)
  redstone.setOutput ("bottom", true)

  if A == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

  if B == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2) 

  if C == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

  if D == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

end

end

Every time I run it, I get the 'attempted to call nil' message after pressing '1' and therefore written '1' to Door.
Does anyone know what I've done wrong?

[elrond1369]

Mort96, on 06 January 2012 - 09:13 PM, said:

Hello everyone.
I just made this small script in computercraft:

running = true
Door = "nil"

while running == true do

Door = read()

if Door == "exit()" then
  running = false
elseif Door == "1" then
  serialData (1, 0, 0, 0)
end

function serialData (A, B, C, D)
  redstone.setOutput ("bottom", true)

  if A == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

  if B == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2) 

  if C == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

  if D == 1 then
	redstone.setOutput ("bottom", true)
  else
	redstone.setOutput ("bottom", false)
  end
  sleep (0.2)

end

end

Every time I run it, I get the 'attempted to call nil' message after pressing '1' and therefore written '1' to Door.
Does anyone know what I've done wrong?

If you put anything before if you will get nil so you can't use elseif because it isn't running a argument it's trying to find the command elseif. Also you don't want to start with door = nil without it door won't be a variable until you type somthing in.
I recommend this
File name: startup

write("Password:")

password = read()
if password == "password" then
shell.run("unlock")
else
write("Incorrect Password!") sleep(2) os.shutdown()
end

File name: unlock

shell.run("clear")
redstone.setOutput("bottom", true)
print(" [1]  exit")

option = read()

if option == "1" then
os.shutdown()
else write("Invalid option try again...") sleep(2) shell.run("unlock")
end

If you want somthing more you can download my Safety Deposit Box program and edit it. It's on the Computer Craft library topic on the 4th page

[Poesidon2012]

I have that problem too.

[trans08]

elrond1369, on 06 January 2012 - 10:55 PM, said:

If you put anything before if you will get nil so you can't use elseif because it isn't running a argument it's trying to find the command elseif. Also you don't want to start with door = nil without it door won't be a variable until you type somthing in.
I recommend this
File name: startup

write("Password:")

password = read()
if password == "password" then
shell.run("unlock")
else
write("Incorrect Password!") sleep(2) os.shutdown()
end

File name: unlock

shell.run("clear")
redstone.setOutput("bottom", true)
print(" [1] exit")

option = read()

if option == "1" then
os.shutdown()
else write("Invalid option try again...") sleep(2) shell.run("unlock")
end

If you want somthing more you can download my Safety Deposit Box program and edit it. It's on the Computer Craft library topic on the 4th page

I get a error saying "unlock :2: attempt to call nil".

[Gringomotel]

hi guys, I'm trying to make a regular password protected door with a redstone wire behind the computer and under a double reinforced stone door. this is how my code looks and it's probably sloppy but I'm very bad at cc. and I'm using it as a startup program.

however I get up startup:3: attempt to call nil, doesn't that mean that my third line dont exist ?

os.pullEvent = os.pullEventRaw
term.clear()
term.setcursorpos(1,1)
print ("Please enter password: ")
input = read("*")
if input == "TIC" then
print ("Welcome")

rs.setoutput("back", true)
sleep(5)
rs.setoutpu("back", false)

else
print("ACCESS DENIED")
sleep(3)

os.shutdown()
end

[Gringomotel]

hi guys, I'm trying to make a regular password protected door with a redstone wire behind the computer and under a double reinforced stone door. this is how my code looks and it's probably sloppy but I'm very bad at cc. and I'm using it as a startup program.

however I get up startup:3: attempt to call nil, doesn't that mean that my third line dont exist ?

os.pullEvent = os.pullEventRaw
term.clear()
term.setcursorpos(1,1)
print ("Please enter password: ")
input = read("*")
if input == "TIC" then
print ("Welcome")

rs.setoutput("back", true)
sleep(5)
rs.setoutpu("back", false)

else
print("ACCESS DENIED")
sleep(3)

os.shutdown()
end

[Gringomotel]

hi guys, I'm trying to make a regular password protected door with a redstone wire behind the computer and under a double reinforced stone door. this is how my code looks and it's probably sloppy but I'm very bad at cc. and I'm using it as a startup program.

however I get up startup:3: attempt to call nil, doesn't that mean that my third line dont exist ?

os.pullEvent = os.pullEventRaw
term.clear()
term.setcursorpos(1,1)
print ("Please enter password: ")
input = read("*")
if input == "TIC" then
print ("Welcome")

rs.setoutput("back", true)
sleep(5)
rs.setoutpu("back", false)

else
print("ACCESS DENIED")
sleep(3)

os.shutdown()
end

[TrinityHax]

Gringomotel, on 12 January 2013 - 04:37 PM, said:

hi guys, I'm trying to make a regular password protected door with a redstone wire behind the computer and under a double reinforced stone door. this is how my code looks and it's probably sloppy but I'm very bad at cc. and I'm using it as a startup program.

however I get up startup:3: attempt to call nil, doesn't that mean that my third line dont exist ?

os.pullEvent = os.pullEventRaw
term.clear()
term.setcursorpos(1,1)
print ("Please enter password: ")
input = read("*")
if input == "TIC" then
print ("Welcome")

rs.setoutput("back", true)
sleep(5)
rs.setoutpu("back", false)

else
print("ACCESS DENIED")
sleep(3)

os.shutdown()
end

line 3: term.setcursorpos(1,1)
line 9: rs.setoutput("back", true)
line 11: rs.setoutpu("back", false)

should be:

term.setCursorPos(1,1)
rs.setOutput("back", true)
rs.setOutpu("back", false)

because its case sensitive

[MessOfGaming101]

Gringomotel, on 12 January 2013 - 04:35 PM, said:

hi guys, I'm trying to make a regular password protected door with a redstone wire behind the computer and under a double reinforced stone door. this is how my code looks and it's probably sloppy but I'm very bad at cc. and I'm using it as a startup program.

however I get up startup:3: attempt to call nil, doesn't that mean that my third line dont exist ?

os.pullEvent = os.pullEventRaw
term.clear()
term.setcursorpos(1,1)
print ("Please enter password: ")
input = read("*")
if input == "TIC" then
print ("Welcome")

rs.setoutput("back", true)
sleep(5)
rs.setoutpu("back", false)

else
print("ACCESS DENIED")
sleep(3)

os.shutdown()
end

first u forgot a t on the rs.setoutput("back", false)
also you need to capitalize all the O's in the words Output
you also need to capitalize the C in cursor

if you need more help just write me!