Question

How to change or limit the number of CPU cores involved for processing (OCR) in FineReader?

Answer

By design, FineReader PDF 15 and FineReader 14 can use N-1 cores from N cores available for the processor. This leads to N-1 Background executor processes (FineExec.exe) being started after FineReader is launched.

For example, if a computer has N=8 CPUs, then N-1=7  FineExec.exe processes will be launched.

To change the default settings for number of processor cores used for OCR, please start FineReader > go to Tools menu > Options... > Other > Number of processor cores to use for OCR.

Another limit for cores used for OCR is applied for processing documents via Hot Folder. 2 cores can be used for Hot Folder in FineReader Corporate version. The number of cores used by Hot Folder is restricted by the license parameter Hot Folder Core Count and can be checked in the license parameters in FineReader: Help menu > About > License Info > Show license parameters.
Note: Hot Folder is not available in FineReader Standard version.