Having problems with strings in HTML

[Kiana Toufighi]

Hi,

I get a very odd error:
ValueError: unsupported format character 't' (0x74) at index 237

Here's my code:
HI_LITE_FILE_NAME = '/var/tmp/out.txt'

print '''
            <a 
href="http://bbc.botany.utoronto.ca/ntools/cgi-bin/ntools_treeview_word.cgi?input=&max=2&values_off=no&remove_bracket=no&show_line_nr=yes&show_link_out=yes&decimal_places=10&show_classification=yes&db=arabidopsis&selection=any%20term&mode=&mode_nos=&yellow_blue=yes&local_file_name=%(OUT_FILE_NAME)s&show_instructions=no&expt_link=NASCArrays&max_adjust=2&view_size=large&highlight=%(HI_LITE_FILE_NAME)s">GraphicalOutput</a>
         ''' % {'OUT_FILE_NAME': OUT_FILE_NAME, 'HI_LITE_FILE_NAME': 
HI_LITE_FILE_NAME}

I wonder if this has something to do with HTML's % character.

KT