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I have created a custom .bst file with the makebst program. Whenever I run BibTeX on it I first get the following error:

z is an unknown function --- line 169 of file eup.bst

Then for all entries in the bib file i get (where Aldrich1995 is the first example):

"Aldrich JH" is a string literal, not a function, for entry Aldrich1995
while executing --- line 1431 of file eup.bst
You cant pop an empty literal stack for Aldrich1995 

I am a beginner with .bst files so I have no idea what is going on here.

P.S: a link to the file: http://www.easy-share.com/1916347685/eup.bst

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Welcome to TeX.sx! It's not necessary to sign your questions (as there is already a box with your username below it) or to begin them with a greeting. –  Joseph Wright Jun 28 '11 at 8:34
    
Did you just use makebst, or did you also customise anything afterwards? Can you post your .bst file somewhere we can see? –  Joseph Wright Jun 28 '11 at 8:35
    
Thanks, i have added a link to the file above –  Thomas Jensen Jun 28 '11 at 8:40
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1 Answer

The string z is used in the .bst file but not declared. Change the line

STRINGS { s t}

to

STRINGS { s t z }

and the problem should go away. (If there are further errors, please construct a minimal LaTeX + BibTeX example, as I have done in my answer to Hyphenating a number in the BibTeX pages field.)

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Thanks a lot, that did the trick!! –  Thomas Jensen Jun 28 '11 at 9:29
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