# Merged project 1st step results disappearing **URL:** \ **Category:** PIX4Dmapper\ **Created:** [November 20, 2025, 3:37pm UTC](https://community.pix4d.com/t/merged-project-1st-step-results-disappearing/34218 "2025-11-20T15:37:18Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![drones2](https://avatars.discourse-cdn.com/v4/letter/d/839c29/32.png) [@drones2](https://community.pix4d.com/u/drones2)\ **Post date:** [November 20, 2025, 3:37pm UTC](https://community.pix4d.com/t/merged-project-1st-step-results-disappearing/34218/1 "2025-11-20T15:37:18Z")
Hi, I’m running Pix4dmapper 4.10.0. I need to merge two projects, one is with rgb images, one has thermographic .tiff files. The projects seem to merge fine and I can see the tie points and in the 3d view after the merging. As soon as I open the processing options and change any setting before starting the step 2 or 3 (even if I don’t change any setting at all) and I press ok, the 1st step greys out and I can’t process step 2 or 3. If I close and reopen the merged project, the tie points disappeared and the 3d view is empty. If I press x rather than ok in the processing option, nothing happens and I am allowed to run step 2 and 3. I need to change my processing settings as I want to produce a thermographic model, so I want to use the rgb photos to generate the geometry and the thermal photos for texturising. I can’t re-run the 1st step in the merged project as it will mess up my alignment and several photos, especially the thermal ones become uncalibrated. So I’m stuck. I tried two different PCs and I get the same behaviour. Can anyone help please? ---
**Author:** ![Kapil\_Khanal](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/kapil_khanal/32/304_2.png) [@Kapil\_Khanal](https://community.pix4d.com/u/Kapil_Khanal)\ **Post date:** [December 1, 2025, 10:20pm UTC](https://community.pix4d.com/t/merged-project-1st-step-results-disappearing/34218/2 "2025-12-01T22:20:39Z")
Hello @drones2, I recommend reviewing the support article below and following each step carefully. Ensure that both subprojects are free from issues, such as multiple blocks, and that all steps are completed correctly. > **[How to merge projects - PIX4Dmapper](https://support.pix4d.com/hc/en-us/articles/202558529)** > > This article provides step-by-step instructions on how to merge projects in PIX4Dmapper. There are two parts when merging a project: Before merging projects and while merging projects. > **[Processing thermal images](https://support.pix4d.com/hc/en-us/articles/360000173463#label4)** > >   IN THIS ARTICLE Introduction to thermal mapping Which images can be used for thermal projects? Which Pix4D software can process thermal images? Which thermal cameras are supported and which temperat ---
**Author:** ![drones2](https://avatars.discourse-cdn.com/v4/letter/d/839c29/32.png) [@drones2](https://community.pix4d.com/u/drones2)\ **Post date:** [December 19, 2025, 8:40am UTC](https://community.pix4d.com/t/merged-project-1st-step-results-disappearing/34218/3 "2025-12-19T08:40:01Z")
Thank you, can you suggest any articles on how to fix the multiple blocks issue and especially how to identify each individual block? I know that in theory it should be done by adding mtps but I have no visible issues in the ray cloud so I can’t tell where to add them. ---
**Author:** ![Kapil\_Khanal](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/kapil_khanal/32/304_2.png) [@Kapil\_Khanal](https://community.pix4d.com/u/Kapil_Khanal)\ **Post date:** [December 19, 2025, 5:33pm UTC](https://community.pix4d.com/t/merged-project-1st-step-results-disappearing/34218/4 "2025-12-19T17:33:04Z")
Hello @drones2, to identify the location of multiple blocks, you can look at your quality report under ‘2D Keypoint Matches’. The blocks are represented by different colors as shown in the figure below. ![image](https://global.discourse-cdn.com/pix4d/original/2X/5/5598c4e193cc3d853abf2568a72d55956027162e.jpeg) If you are looking for the support article on how to create mtps, I would recommend that you go through the support article below, > **[How to import and mark Manual Tie Points (MTPs) - PIX4Dmapper](https://support.pix4d.com/hc/en-us/articles/360000395103)** > > This article provides step-by-step instructions on how to import and mark Manual Tie Points (MTPs) using two methods: using the rayCloud and using the GCP/MTP Manager. An Automatic Tie Point (ATP) is