Did you contact support yet?
…support phone number call +1 (877) 206-2092.
Global Phone Support
We have expanded English-language publisher phone support. To make contacting the iBookstore support even easier, new local phone numbers are now available for Australia, France, Germany, Italy, Netherlands, Spain, and the U.K. Support is available Monday to Friday, from 7 a.m. to 5 p.m. (PT).
Country Phone Number Australia 1300 307 504
Note that this is a low tariff number.
France 0805 540 117 Germany 0800 664 5307 Italy 800 915 902 Netherlands 0800 0201 578 Spain 900 812 687 U.K. 0800 975 0615 U.S. +1 (877) 206-2092
Toll-free from U.S. and Canada.
"K T" and "connielou", you are both right!! I got a very friendly answer to my email just a few hours later. I think I made my conclusions due to the fact that you don't easily find an email address to write to in the support section; just contact forms to fill out with a multitude of options to chose from, and none of them actually to the point.
Well, now the problem is solved. I'll include the conversation if anyone else looks for a solution:
thanks for your quick and kind reply! I had to relaunch the "iTunes Producer" to be able to choose "Window > Sign in as" otherwise it was disabled. Once logged in I chose "Open package…" and located the file created by iBooks Author with the file extension .itmsp
8 mar 2013 kl. 18:08 skrev email@example.com:
Thank you for contacting iBookstore Publisher Support regarding your iTunes Producer error you received.
I researched the error you received "There is a problem with your Login Information. Please click Back and try again. ***-[_NSCFString substringToIndex:]: Range or index out of bounds" and usually this refers to the Apple ID and password used to automatically log iTunes Producer into iTunes Connect.
Please try to resolve by choosing from the iTunes Producer 2.9 upper left-hand menu the drop down from "Window > Sign in as" and change your Apple ID and password. If doesn't resolve the issue, please reply to this email with additional screenshots and your system information (for example: using iMac with Mac OS X 10.8.2)
To ensure you have the correct system requirements, iTunes Producer requires a Macintosh with an Intel Core processor, at least 512 MB RAM and Mac OS X version 10.6 or later installed. Apple recommends at least 20 GB of available hard disk space (more for larger content) and a broadband internet connection with an upload rate of 1MB/sec or faster.
I have also listed the link to our FAQs that includes an overview of delivering books to the iBookstore:
When delivering books to us, make sure you are delivering using the latest version of iTunes Producer, which is available to you in iTunes Connect.
If you would like to discuss this issue further, please feel free to call us directly at 1-877-206-2092, Monday - Friday between the hours of 7:00 AM - 5:00 PM (Pacific Time) or fill out a Contact Us form in iTunes Connect.
Depending on the topic you choose in the Contact Us area of iTunes Connect, useful answers to frequently asked book questions (FAQ's) will display that may assist you with your issue.
iBookstore Publisher Support