"Library name is not assigned" PLEASE HELP

[iressa13]

Hello so I was working on a project and stepped away from my computer for an hour and came back to realize I hadnt saved my work. I had barely started so it didn't matter but when I typed in the same commands as I had earlier in order to import data I'm getting an error message that reads "library name is not assigned". I am new to SAS so since I got it to work the first time I took a screenshot for reference so I know I am typing everything exactly as I did the first time. I played around and tried using different libnames with no luck. What am I doing wrong? Does it have to do with that I already did all this earlier? I see the message that the physical loction is the same as "mylib" which is one of the names libnames i played around with when it wasnt working. I've uploaded both the screenshot I took before losing the work and the error message. I have a project due soon so thank you for any help!

[RahulG]

Library assignment is for P1 and then in the next step the library used is biostats.

You should also define biostats libname.

[iressa13]

ahh it worked thank you so much. So simple but very confusing when you're new to all this:)