Textbook provided OLG model does not run

Hey everyone,

so I have been wanting to simulate a Blanchard-Weil model given on the website of the textbook Dynamic Macroeconomics. I have attached the
file I copy and converted it to .mod. and made no alteration to it.

ch_6_blanweilgovtax10pc.pdf (20.9 KB)

However, when I try to run it, this error shows up:

Does anyone know what is going wrong here?
Thank you very much in advance.

Please provide the mod-file, not just a pdf.