Yesterday and today I worked on the same problem and progress only by tiny steps. I have to rethink my approach because I must be making something wrong. Ordered some text book. The online stores had a availaibility of one to two weeks. Way too long. Phoned the local book stores and got lucky. Nice clerk: "Yes, we have three exemplars. Do you want to take them all?" No, thank you. One is enough. One of my coworkers will pick it up for me and I will have it tomorrow. *relieved sigh* Beating my head against the desk wasn't fun anymore.