Hi,
for .Close and .Dispose confided on the instruction "Using" (one of the tests was to explicitly call .Close and .Dispose but the result is not changed); the code above was just an example to cause the error locally, i don't need to open 36k reports, the real case is a wcf service on IIS which on request creates a .pdf and send it by email; after countless executions when the error occurs i have to execute a recycling of IIS .
Thanks,
PB