Lingo in a Nutshell

Network Errors—netError()

The error codes returned by netError() depend on the environment. In Authoring and Projectors, the errors are generated from the INetURL Xtra (Macromedia’s http implementation). In Shockwave, the error codes come from the browser (Netscape or MIE).

Error Handling in Shockwave versus Projectors

During Authoring and from Projectors if you attempt to preLoadNetThing(url) with a bad URL, netError() will report an error 4165, "Requested object could not be found.” In Shockwave the same attempt may still return a human-readable HTML page if the server name is valid, but the page is simply missing. The returned HTML text may be, “The requested object could not be found on the server.” Example E-1 detects the situation properly.

Example E-1. Error Handling

property pUrl
property pNetId

on startDownLoad me, url
  set pUrl = url
  set pNetId = preloadNetThing(pUrl)
end startDownLoad

on checkProgress me
  -- Call this periodically
  if netDone(pNetId) then
    case (netError(pNetId)) of
      "OK", 0: importFileInto member "dynamic content", pUrl
      otherwise: alert "Error:" && netError(pNetId)
    end case
  end if
end checkProgress

Table E-6 shows the netError() error codes. Those over 4000 appear to be TCP error codes.

Table E-6. Macromedia NetError() Codes

Code	Meaning
[a]
0	“OK”
1	Usually a memory error, but possibly a bus error.
4	“Bad MOA Class”—network Xtras may not be properly installed. Check with the netPresent (not the netPresent() function).
5	“Bad MOA Interface” (see “Bad ...