rednet : 87 : number expected

okay, i was trying to create a simple network that let's players wander through my base based on their access Level. i've hit a small snag though, i'm using the Mag Reader for verification, on the one door i have(so far) when i swipe my access card, the Server computer crashes with this message

rednet : 87 : number expected

if anybody can spot the problem i would appreciate any help you can offer :)/>

path= "users/"

function newUser(username, access)
if fs.exists(path..username) then
  return false
else
  h = fs.open(path..username, w)
  h.write("7")
  h.flush()
  h.close()
end
end
function getUser(username)
  if fs.exists(path..username) then
	h = fs.open(path..username, r)
	access = h.readline()
	h.close()
	return access
end
end
function processRequest(id, message)

sends = getUser(message)
rednet.send(tonumber(id), sends)

end

rednet.open("back")

id,message = os.pullEvent("rednet_message")
processRequest(id, message)

I think you need you something to collect the event type:

local event, id, message = os.pullEvent("rednet_message")

Like Con0747 said you need to store the event type.

os.pullEvent() will always return the event, even when you specify a filter.

So in your case its returning "rednet_message", senderID, mesage

You are only accepting 2, so 'id' becomes "rednet_message" and 'message' becomes the ID of the sender.

Also, somethings I noticed in your code:

h = fs.open(path..username, w)
h.write("7")
h.flush()
h.close()

'w' in the first line should have quotes (""), since it needs a string.

And you only need to do close(), not flush() and close().
Flush is used when you want to save to the file without closing it.
Close saves anyway.

Better yet, use rednet.receive():

local id, message = rednet.receive()

Con0747, on 15 February 2015 - 08:12 PM said:

I think you need you something to collect the event type:

local event, id, message = os.pullEvent("rednet_message")

No I have used the redstone event to simply wait for a redstone signal before contuining in a program so I do not think that is the problem

TechedZombie, on 15 February 2015 - 09:50 PM said:

No I have used the redstone event to simply wait for a redstone signal before contuining in a program so I do not think that is the problem

Con is right, I elaborated in my previous post.

Also this is rednet, not redstone.