backward airmass only run for 3 months.

[adh19d]

Hi All, Please help. I can only get my backward air masses to run for 3 month periods. If i extend the period e.g., to 4 months of greater it doesn't work

here's the code:

trajectory_model <-
create_trajectory_model() %>%
add_trajectory_params(
lat = 0.0402,
lon = -77.9969,
met_dir="~/hysplit/met",
height = 50,
duration = 96,
days = seq(
lubridate::ymd("2020-01-01"),
lubridate::ymd("2020-03-01"), ###if i change to 2020-05-01 for example i get an error.
by = "7 day"),
daily_hours = c(0,6,12,18),
direction = "backward",
met_type = "gdas1") %>%
run_model

Get a data frame containing the model results

mod1=get_output_tbl(trajectory_model)
trajectory_plot(mod1)