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I have a Kotlin Multiplatform app that I’m trying to get to work with Realm/Atlas. When I try to do a Realm.open(it) it says:

IllegalStateException@29576} "java.lang.IllegalStateException: [RLM_ERR_SCHEMA_VALIDATION_FAILED]: Schema validation failed due to the following errors: Property ‘PelletInsertionVisit.pelletMapAsList’ of type ‘array’ has unknown object type ‘PelletToNumberUsedMapEntry’

I have multiple classes but the ones germane to this are the following:

class PelletInsertionVisit : RealmObject {
@PrimaryKey
var _id: String = ""
var visitDate = LocalDateTime.now().toEpochSecond(ZoneOffset.UTC)
var pelletsUsed: RealmList<Pellet> = realmListOf()
var pelletMapAsList: RealmList<PelletToNumberUsedMapEntry> = realmListOf() //Maps pellet name to number of pellets of that type used

var signedInUser: String = "UNKNOWN" //User name of user performing the update


override fun toString(): String {
    return "PelletInsertionVisit(visitDate=$visitDate, pelletsUsed=$pelletsUsed, pelletMap=$pelletMapAsList, signedInUserUserName='$signedInUser')"
}

}

And this one:

class PelletToNumberUsedMapEntry : EmbeddedRealmObject {
var pelletKey: String = "NOTSET"
var numberUsed: Int = 0
}

Right before I call the Realm.open(it) I execute this code:

    private fun setupRealmSync() {
    val user = runBlocking { appServiceInstance.currentUser }
    val config = user?.let {
        SyncConfiguration
            .Builder(
                it,
                setOf(UserAccount::class,Pellet::class, PelletInsertionVisit::class, PelletLot::class, Patient::class,
                    Practice::class )
            )
            .initialSubscriptions(rerunOnOpen = true) { realms ->
                add(
                    realms.query<PelletInsertionVisit>(),
                    name = "Pellet Insertion Visit info",   
                    updateExisting = true
                )

                add(realms.query<PelletLot>(), name = "Pellet info", updateExisting = true)
                add(realms.query<Patient>(), name = "Patient info", updateExisting = true)
                add(realms.query<Practice>(), name = "Practice info", updateExisting = true)
                add(realms.query<UserAccount>(), name = "UserAccount info", updateExisting = true)
            }
            .build()
    }

So, PelletInsertionVisit is added (and I see it in MongoDB Compass) but it’s not liking the other class. I thought that it being embedded would suffice but is that the issue?