Error: No page open.

[Wentao Ma (Charis)]

I found this error occurred in code line : Go To.   ${URL}/subdir/sub1

It is difficult to debug, Nothing useful message.

Compared all files in different dirs. It seem that Duplicate Import Of Browser Library.

That is it.

In 2 Resource files , There are "Library    Browser" and the second file loads the first file also.

Then problem was solved.