When the QBPOS log file is corrupted, lacks rights, or is blocked by security software, the message Error Initializing QBPOS Application Log occurs. It may prevent data from being opened or saved in Intuit QuickBooks Point of Sale. Renaming the log file, running as administrator, fixing the installation, or examining the firewall and antivirus settings are some fixes. For expert assistance with QuickBooks, dial 1.855.738.2784.