Lotus Notes: Error 0x1A5 – Cause & Solutions

DataHelp Admin | Modified: 2021-05-27T13:47:00+05:30 | Lotus Notes

Lotus Notes is associated with Domino Server and gaining recognition gradually. This is an email client, which offers so many amazing features to its users and a very simple interface. It is not only used in big enterprises, but also in small companies. This email application stores the data in NSF file format. If due for any reason, these files get damaged or corrupted then it may create a problematic situation for users.

Moreover, this unhealthy database of Lotus Notes may lead to different errors during receiving, sending, or executing any other operations. In fact, in case the corruption is of severe level then it may lead to permanent loss of crucial emails. It becomes not so easy to fix these errors. One such common error encountered by users is “Lotus Notes: Error 0x1A5”. Therefore, we have come up with two strategies to fix the problem. However, it is important to learn the causes of the error properly.

Extra Info:

If you are willing to migrate to Microsoft Outlook. Then you should have NSF to PST Converter Wizard. It will help you to migrate complete data.

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Reasons behind the Lotus Notes: Error 0x1A5

There are two main causes behind the issue:

  • If the “Directory=” parameter is absent or missing from the notes.ini file
  • If users execute the tool for database maintenance such as Fixup, Udpdall, or Compact on a separate server.

Now the question arises that what is the notes.ini file?

A Brief Introduction of Notes.ini File

This file plays a significant role when it comes to the appropriate functioning of Lotus Notes and Domino. In case, users set the wrong parameters in Notes.ini file then, Domino and Lotus Notes could not run in a proper way. Notes.ini should be changed only if required or if IBM Notes Supports Services suggests doing so. Any incorrect or improper modification may result in the unpredictable and bad behavior of Domino and Lotus Notes. Let us see that how can we resolve this issue with the help of a manual solution.

Workarounds to Rectify IBM Notes: Error 0x1A5

Solution 1: When the “Directory=” parameter is absent from notes.ini File

This error may occur due to the missing the “Directory=” parameter from the notes.ini file. It should be set to the path of the data directory on the server. Now, for this you need to follow these steps as mentioned below:

  1. First, open the server’s notes.ini file with the help of Notepad or WordPad
  2. Now, under “NotesProgram=”, add the “Directory=”. For instance, Directory=C:\Lotus\Domino\Data
  3. Finally, save & close the notes.ini file. Then, start your Domino server

Solution 2: When “Lotus Notes: Error 0x1A5” Occurs while Start Domino Server

You can resolve this issue with the help of these steps as mentioned below:

  1. First, go to any of the partitioned data directories of the server. For instance, C:\Lotus\Domino\Data1
  2. Now, perform the following line: \. For instance, \nfixup.exe names.nsf -F

Note: – You can also visit our another blog to understand Lotus Notes names.nsf file.


The world is getting digitalized and therefore there are numerous email clients available in the online market. Lotus Notes or IBM Notes is one of those emailing applications that help in the maintenance of the work. However, corruption in the Lotus Notes database file may lead to different kinds of errors. Considering this fact, we have discussed a frequent error faced by users i.e. Lotus Notes: Error 0x1A5. We have learned the main causes behind this issue and two manual tricks to deal with it.