The help system hadn't failed to start. It had been murdered—by automation, by time, by the slow rot of systems nobody loved enough to maintain. And somewhere, Jerry's bonsai tree was long dead, too.
For instance, if you are running a localized Japanese system, verify if the file is trapped in \forms90\doc\JA instead of the required subfolder. frm-18105 failed to start the help system
Open a support ticket to verify the current browser compatibility. Older versions of Forms Builder often depend on Internet Explorer components that may no longer function. Oracle Forums Summary of Quick Checks Checkpoint FORMS_BUILDER_CLASSPATH debugger.jar of new installation is first in 32-bit Java is configured for Form Builder. The help system hadn't failed to start
FRM-18105: Failed to start the Help System typically indicates that Jerry's bonsai tree was long dead