Hi,

I've got an error IndexOutOfRange during during the creation of a package.

what does it mean? what should I do?

Well, this looks to be happening in regards to your deployment data. If you build the package without including the deployment data, does the error persist? I am willing to bet, "no." In that case, you will want to take a closer look at your deployment data entries again and possible remove them and add them back one-by-one to see which was is the culprit. Most times when something like this happens, it is actually an issue at the time of gathering the data from the source.