This error means that the styles.drt file you are using does not have a row with a style code 15 in it. To control how stimuli appear during a DirectRT session, your input files-like the .csv file you uploaded with your previous post-uses numbers in the column named "style" to refer to a second file. This second file is by default named styles.drt and can be found in the DirectRT file folder that was installed on your computer; it's most likely on the C: drive if the default settings were used during the instalation process.
You can solve this by either
1) creating a row in the styles.drt file you use to have a value of 15 in its Code cell (for more information see http://www.empirisoft.com/directrt/h...nce_number.htm)
OR
2) change the values of the style column in your .csv input file to match a number in the Code column of your styles.drt file.
Jason Reed
Empirisoft Software Support Specialist