Not getting rA with umxACEv and a warning

I'm using umxACEv to check correlations between ACE components of 4 characteristics.
The model runs without a problem, and I get correlations for C and E components, but not for A, and I get the following warning:

Warning message:
In sqrt(I * A) : NaNs produced

I don't see something suspicious with the A std paths so I have no idea how to start finding out what might be the problem and would appreciate your help!

multiArcs <- umxACEv(selDVs = c("distArch1", "distArch2", "distArch3", "distArch4"), sep = "_", selCovs = "sex",
dzData = MZs, mzData = DZs,addStd = TRUE)
umxSummaryACEv(multiArcs, std=TRUE, showRg = TRUE,extended=T)

ACEv -2 × log(Likelihood) = 9998.1
Standardized solution

| | A1|A2 |A3 |A4 | C1|C2 |C3 |C4 | E1|E2 |E3 |E4 |
|:----------|-----:|:----|:-----|:-----|-----:|:-----|:----|:----|-----:|:-----|:----|:----|
|distArch1_ | -0.39|NA |NA |NA | 0.80|NA |NA |NA | 0.59|NA |NA |NA |
|distArch2_ | -0.41|0.21 |NA |NA | 0.20|0.2 |NA |NA | -0.14|0.59 |NA |NA |
|distArch3_ | 0.54|0.19 |-0.85 |NA | -0.76|-0.18 |1.03 |NA | -0.32|-0.33 |0.82 |NA |
|distArch4_ | 0.37|0.1 |-0.09 |-0.63 | -0.65|-0.15 |0.32 |0.95 | -0.29|-0.2 |0.13 |0.68 |
Means: Intercepts from model$top$expMean

| | distArch1_1| distArch2_1| distArch3_1| distArch4_1| distArch1_2| distArch2_2| distArch3_2| distArch4_2|
|:---------|-----------:|-----------:|-----------:|-----------:|-----------:|-----------:|-----------:|-----------:|
|intercept | 6.06| 8.14| 7.64| 6.52| 6.06| 8.14| 7.64| 6.52|
Unstandardized path coefficients

| | A1|A2 |A3 |A4 | C1|C2 |C3 |C4 | E1|E2 |E3 |E4 |
|:----------|-----:|:----|:-----|:-----|-----:|:-----|:----|:---|-----:|:-----|:----|:----|
|distArch1_ | -1.41| | | | 2.90| | | | 2.14| | | |
|distArch2_ | -1.16|0.47 | | | 0.57|0.43 | | | -0.39|1.3 | | |
|distArch3_ | 1.51|0.41 |-1.82 | | -2.13|-0.39 |2.21 | | -0.88|-0.72 |1.75 | |
|distArch4_ | 1.09|0.23 |-0.21 |-1.47 | -1.89|-0.34 |0.72 |2.2 | -0.85|-0.46 |0.3 |1.59 |
Genetic correlations

| |rA1 |rA2 |rA3 |rA4 | rC1|rC2 |rC3 |rC4 | rE1|rE2 |rE3 |rE4 |
|:----------|:---|:---|:---|:---|-----:|:-----|:----|:---|-----:|:-----|:----|:---|
|distArch1_ | | | | | 1.00| | | | 1.00| | | |
|distArch2_ | | | | | 0.51|1 | | | -0.23|1 | | |
|distArch3_ | | | | | -0.84|-0.4 |1 | | -0.45|-0.48 |1 | |
|distArch4_ | | | | | -0.75|-0.34 |0.33 |1 | -0.46|-0.32 |0.18 |1 |
Standardized variance-based models may yield negative variances...
[1] "?umxPlotACEv options: std=, means=, digits=, strip_zero=, file=, min=, max ="
Warning message:
In sqrt(I * A) : NaNs produced