Online WGS on NT: data lost by shutdown NT

Hi informix user! We are using the online workgroup server 7.22.TC1 on NT 4.0, running as an automatic NT-Service, and realized the following problem: When we shutdown the operating-system NT, the changes in the database we made, will be lost, if the interval between these changes and the shutdown, is smaller than the checkpoint interval set in onconfig. (By the way, this is also the case, when using the command enterprise center to perform an online shutdown.) The changes of data will not be lost, if a checkpoint is forced (onmode -c) before shutting down NT. If we use 'onmode -k' or just stop the online-service (e.g. net stop online), a checkpoint is automatically made by online. That's why we assume, that the online-service doesn't react on the SERVICE_CONTROL_SHUTDOWN request. Okay, these are the facts - but now the real problem we have under these circumstances: Under normal conditions the online will be shut down by processing the NT-shutdown! Does anybody know: 1. a way to start something like a shutdown script under NT (in order to force a checkpoint) 2. a generel solution for this problem Thank's and bye, Vittoria Di Biagio **************************************** Vittoria Di Biagio, ADG F'rth - Software e-mail: v.dibiagio@adg.de phone: 0911-9300-533 fax: 0911-9300-553