Can v7.9/v7.10 be installed from the command line without the "graphical in

I've done a command-line install on Ubuntu so yes, it can.

We get the following error when installing from command line:
[/usr/local/appian] /data/appian

Installing Appian 7 in /data/appian

Install with these settings? [y/n] y

Installing Appian 7...
Extracting setup files...
Error in action ExecuteAction

Error in action InstallSelectedFiles

can't wait for variable "::conf(solidUnpackDone)": would wait forever
while executing
"vwait ::conf(solidUnpackDone)"
(procedure "::InstallJammer::UnpackSolidArchives" line 59)
invoked from within
"::InstallJammer::UnpackSolidArchives 0"
(procedure "::InstallJammer::actions::InstallSelectedFiles" line 87)
invoked from within
"::InstallJammer::actions::$component $this"
while executing
"$obj execute"
(procedure "::InstallJammer::ExecuteActions" line 62)
invoked from within
"::InstallJammer::ExecuteActions $action -parent $id -conditions $eval"
(procedure "::I...

When I've had this before, it was a permissions issue but I can see that you have already checked that so I'm not sure. It might be worth opening a support case.

Another idea is to re-download the installer. We have seen that sometimes poor connectivity or additional network security can impact the downloaded file.

Thanks for the recommendation...we will try that. We have found several other references to similar issues posted on other forum sites that indicate it is likely a corrupt file.