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When changing the ddi file events, reactions, etc. can be added, modified or deleted.
To reduce database load modify the AxxonPSIMpsim.ddi file as follows: 

1. Open the AxxonPSIMpsim.ddi file in the ddi.exe utility.
2. Select the CAM object.
   Image RemovedImage Added
3. Go to the Events tab.
4. Set the Do not record and Do not send to the network checkboxes Disable network connection and Disable logging checkboxes checked for the MD_START (Alarm) and MD_STOP (Alarm end) events.

5. Save the file.

6. Update the database using the idb.exe utility (the Update database button, see Interface elements of the idb.exe window).

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In order the AxxonPSIMpsim.ddi file is not substituted it is to be saved with another name at step 5 - e.g. "AxxonPSIMpsim_1.ddi". Thus, 2 files of external settings are saved in the Languages catalog: source file and modified one. The idb.exe utility loads them in alphabetical order. As a result the AxxonPSIMpsim_1.ddi file is loaded the last one and its parameters are applied when database is updated.

If the event list in AxxonPSIMpsim_1.ddi is different from the original Axxon PSIMpsim.ddi, e.g. some events are added or deleted, then the event list is merged by idb.exe DB update.

When installing a new Axxon PSIM version the AxxonPSIMpsim_1.ddi file is not affected by the installation wizard and changes are saved.

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