To eliminate your project as the cause, try using one of the sample projects & generate AIR help with it. If it works, then you know that your project is at fault; if it doesn't, then something in the RH install is wrong.
Thanks for your response. I tried to create Adobe AIR output using one of the sample projects. The same error message was still displayed. I reinstalled RoboHelp 8 and attempted to create the AIR output to see the same error message.
However, I am able to create AIR output from WebHelp of the same project using the RoboHelp Packager for RoboHelp AIR.
I'm not familiar with "RoboHelp Packager for RoboHelp AIR" - I've always created AIR help by using the Single Source Layout in RH8. Maybe you should try creating a new AIR SSL layout (don't copy an existing one - create a new one from scratch to eliminate corruption).
I think RoboHelp 7 was when Adobe came up with the idea of AIR Help. At the time, it was a separate download and allowed the help author to package a WebHelp output as AIR Help.
RoboHelp 8 had the feature included as part of the main output types.
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Thank you so much. I once again installed RoboHelp 8 and created the project from scratch. This time I successfully generated the Adobe AIR output.
Thank you once again!