Error on syntax for generating coverage data from multiple files using lcov in Windows

I would like some help... I'm having trouble coming up with the syntax to generate coverage data from multiple files using lcov in Windows.

I have gcov, lcov and genhtml installed on cygwin (I'm running this under Windows). All of those files are inside cygwin/bin directory. The coverage data I flush through I believe are perl scripts created from JsTestCoverage and has the following format:

SF:C:/test/jquery.js
DA:22,1
DA:23,1
...
end_of_r开发者_如何转开发ecord
SF:C:/test/testFile.js
DA:3,1
DA:6,1
...
end_of_record
//rinse and repeat till no more files

Note I have NOT used genhtml on the coverage data yet.

I then tried something like:

perl genhtml /../home/administrator/coverage1.dat /../home/administrator/coverage2.dat

But got an error saying:

genhtml: Can't use an undefined value as a HASH reference at genhtml line 1506.

I'm not sure whether I've got the process wrong either, being not from linux background at all.

Thanks in advance.

---

Worked out to be that there were repeating results in the coverage data. I took out the repeating data, and the error disappeared.

Thanks.