In Chapter 14, i've tested the example C14PPTAutomationSvcs.zip about powerpoint conversion services, but this one failed with this error: The specified document cannot be converted.

i've configured correctly powerpoint conversion services with SPFARM account on the pool and run the service in central administration.

this code failed on 3 different VM with the same error, i've nothing else in LOGS.

Any help ? thank's.