I got EXACTLY the same problem when I was making my Asharru character. Turns out I had forgotten to apply that morph to one of V4's empty channels... Let me try to explain:

In your injector, you have to find where your morph begins. If it goes something like this:

actor head:1
    {
    channels
        {
        targetGeom YourMorphName
            {
            name YourMorphName
            initValue 0
            forceLimits 1
            min -100000
            max 100000
            trackingScale 0.02

 

((etc))]

then you'll have problems. It won't know in which dial it should insert the morph, and it will deform. V4 comes with empty dials so that you can insert custom morphs into them, there's PBMDC_00 to PBMDC_50 (will show up under Daz Morphs in V4) and PBMCC_00 to PBMCC_50 (will show under Community in V4). So you'd have to do it like this:

actor head:1
    {
    channels
        {
        targetGeom PBMCC_30
            {
            name YourMorphName
            initValue 0
            forceLimits 1
            min -100000
            max 100000
            trackingScale 0.02

 

((etc))

That way, it'll use the PBMCC_30 channel, but to the user it'll appear as YourMorphName. You'll also have to change that in your hide, unhide and rem files, if existant, with the same channel name.

Most injection making tools give that option and will do that for you, though. I haven't used the one you mentioned, but looking at its page's images... it prompts you with a "select channel" upon saving, you should pick one of the PBMCC_ there (try for a random number, avoid the first numbers, because it'll replace anything already in the channel you chose - and a lot of people use low numbers, then your user wouldn't be able to mix those two faces).

 

Also, something to remember: don't INCLUDE the morphs++ shapes into your custom morph. They're not a Merchant Resource. Any use of the morphs++ has to be in the form of mere dial values, so that your end user would need to have bought the Morphs++ pack too.

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.