
It seems like a bug, but I cannot say for sure. I don't know if
anyone was found to continue the code maintenance and development
of Electric. So currently, there might not be anyone to fix the
source code if that is the case. If you know JAVA programming,
you can get the code from the repository [
https://www.staticfreesoft.com/jmanual/mchap01-04-01.html ] and
modify it yourself.
It might not be convenient, but closing Electric, opening
Electric, and opening your Library again might be the only way to
remove the 'Electric Messages' windows.
Under Display Control
https://www.staticfreesoft.com/jmanual/mchap04-03.html
you might try with "Show cell results in new window" unchecked and/or try changing Display style from "Operating-System default" to "SDI" to see if it changes the behavior or not.
I'm not able to reproduce the problem on my Windows 10 system
with Electric 9.07 (from Help -> About Electric), JAVA 8 Update
191 (Control Panel -> Java -> General tab -> About), and
LTSPICE XVII(x64) Oct 23 2018 (Help -> About LTspice XVII).
Though, it may be because the Waveform viewer in Electric is
broken with LTSPICE XVII anyway. I just open the raw file
directly in LTSPICE XVII to get around that. I haven't tried
falling back on the older LTspiceIV [
https://www.mail-archive.com/electr...@googlegroups.com/msg01407.html
]. Or it might also be that more specific steps are needed for
reproducing problem.
It looks like you are using Windows 7. What version of Electric and what version of JAVA are you using? If you provide the versions, it might help others in the future if they encounter the same problem. It is sometimes possible for bugs to come from JAVA rather than Electric.
Kind Regards,
Gavin

Good to hear that updating the JAVA runtime version helped.
Regarding automatically bring up the waveform viewer, I think that should be possible.
The setting you need is most likely in Preferences on the Tools
-> Spice/CDL window:
https://www.staticfreesoft.com/jmanual/mchap09-04-03.html
I believe it might be the "Run probe" that has to be checked.