Error: Problem with `mutate()` column `ols`. ℹ `ols = (function (object, ...) ...`. x variable names are limited to 10000 bytes

Hello,

I am receiving an error when using the reconcile() function. I am performing hierarchical forecasting on a data set with many hierarchical levels.

tic()

fit <- EMEA_shipments_08 %>%
  model(arima = ARIMA(ZCOPASMG))

toc()

tic()

fc <- fit %>%
  reconcile(
    ols = min_trace(arima, method="ols")
    #wlsv = min_trace(arima, method="wls_var"),
    #wlss = min_trace(arima, method="wls_struct"),
    #mint_c = min_trace(ets, method="mint_cov"),
    #mint_s = min_trace(arima, method="mint_shrink")
  ) %>%
  forecast(h = "2 years")

Error: Problem with `mutate()` column `ols`.
ℹ `ols = (function (object, ...) ...`.
x variable names are limited to 10000 bytes
Run `rlang::last_error()` to see where the error occurred.

I suspect this error is occurring because I have 7 columns in my hierarchy, with thousands of of levels for these columns. I know this is not reproducible code, but I think the description of my problem is clear.

Is there a maximum size to a hierarchy that the reconcile function is intended to work with? Is it possible that the source code will be changed to accommodate larger hierarchies?

I am curious to learn more about this topic, and I love the fable package and its functionality.

Start with the supplied reconcile() call using min_trace(..., method="ols") and inspect rlang::last_error() to locate where the variable-name limit is reached. Reproduce the failure with a hierarchy resembling the reported seven columns and thousands of levels. Done means establishing whether the hierarchy exceeds a supported limit and, if a code change is appropriate, adding coverage for the failing case.