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if msg.isButtonPressed() error

I keep getting this error

255:     screen.Show()
256: while true
257: msg = wait(0, screen.GetMessagePort())
258: if msg.isButtonPressed()
259: ' print "Evt: msg.GetMessage();" idx:"; msg.GetIndex()
260:
261: if msg.GetIndex() = 1
262: exit while
263: endif
264: if msg.GetIndex() = 2

/tmp/plugin/FPAAAA997H4h/pkg:/source/appMain.brs(258): runtime error ec: 'Dot' Operator attempted with invalid BrightScript Component or interface reference.

258: if msg.isButtonPressed()



sometimes it will still load with it sometimes it wont
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4 Replies
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Level 7

Re: if msg.isButtonPressed() error

Sounds like you are getting invalid instead of an actual message, which was covered somewhat in http://forums.roku.com/viewtopic.php?f=34&t=31487. The simple solution is to throw another check that a valid event message was received (msg <> invalid).
-- GandK Labs
Check out Reversi! in the channel store!
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Highlighted
Level 7

Re: if msg.isButtonPressed() error

is because there is no "then" in there?

ive had issues with them placed in the wrong spot


msg = wait(0, screen.GetMessagePort())
if msg.isScreenClosed() then
print "Screen closed"
exit while
else if msg.isButtonPressed()


or should the "then " be with the elseif msg.isButtonPressed() ?
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Highlighted
Level 7

Re: if msg.isButtonPressed() error

The "then" of an if statement is optional, so that has no bearing. I was referring to the msg variable holding an invalid values, so something like this may be required:


msg = wait(0, screen.GetMessagePort())
if msg<>invalid then
if msg.isScreenClosed() then
print "Screen closed"
exit while
else if msg.isButtonPressed()
... do something ...
end if
end if
-- GandK Labs
Check out Reversi! in the channel store!
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Highlighted
Level 9

Re: if msg.isButtonPressed() error

We have an open bug we can easily reproduce by hitting the Home button on a script that causes a wait() with a timeout of zero to return an invalid message. We consider this a bug on our part and will fix it.

Do you have another scenario that causes invalid to be returned from a wait() with a timeout of zero??

--Kevin
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