Raise a more informative error message.

[mo2561057]

respy/respy/solve.py

Lines 74 to 88 in fd580c3

	for i, choice in enumerate(optim_paras["choices"]):
	if f"wage_{choice}" in optim_paras:
	wage_columns = optim_paras[f"wage_{choice}"].index
	log_wage = np.dot(
	states[wage_columns].to_numpy(dtype=COVARIATES_DOT_PRODUCT_DTYPE),
	optim_paras[f"wage_{choice}"].to_numpy(),
	)
	wages[:, i] = np.exp(log_wage)
	if f"nonpec_{choice}" in optim_paras:
	nonpec_columns = optim_paras[f"nonpec_{choice}"].index
	nonpecs[:, i] = np.dot(
	states[nonpec_columns].to_numpy(dtype=COVARIATES_DOT_PRODUCT_DTYPE),
	optim_paras[f"nonpec_{choice}"].to_numpy(),
	)

This is a part of the code that will frequently throw errors due when dealing with large models.
If there is a small spelling mistake or a corrupted row in the params file there will be a key error here.
I think we could provide the user with a more informative message indicating that this is probably due to a variable that is misspelled or not in the covariates.

[tobiasraabe]

Very good idea!