Nodes loaded from file read-only?

[EMC3]

Hello,

I wrote this simple code:

YAML::Node n = YAML::LoadFile(file); // as described in the tutorial

I have no problems accessiong the contents of n, and the file exists. But as soon as i write

n["whatever"] = somevalue;

i get an YAML::BadSubscript exception (what(): operator[] call on a scalar). Is this a bug or are loaded nodes read-only? If i create the node by writing

YAML::Node n;

i can write into without any problem.

Thanks

[jbeder]

The error message indicates that n is a scalar, not a map. You cannot set a key/value pair in a scalar (what would it do?).

Also, note that on the README, it says:

If you have questions about how to use yaml-cpp, please post it on http://stackoverflow.com and tag it yaml-cpp