If an an EPS file which contains binary data is placed into an Indesign document and you then print the publication with the output Data Format set to ASCII, the EPS data goes through the PostScript pass through route in the code and binary data will be produced. This is a possible cause for the print job to fail.
Currently, InDesign determines if an EPS contains binary data by checking for the existance of the %%DocumentData comment. If present, InDesign searches for three valid parameters for this DSC comment: Clean7Bit, Clean8Bit or Binary.
If the parameter is set to Binary, or if the %%DocumentData comment is missing from the EPS, InDesign will give a warning message and allows to cancel the print job.
InDesign will only check for this condition when printing and output data format is set to ASCII.
InDesign will not check when exporting to EPS, since the error message is designed for printing.
InDesign will not check Photoshop EPS files.