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It is almost certainly due to a missing comma in the line above. Remember that each line in a directive block (verb followed by directives keyword=value) must terminate with a comma, except the last line. Also check for misplaced "=" or "/".

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Observations are archived in MARS with 2 days delay. As a rule of thumb, you can always access date = -3, as the time at which observations archiving is carried out may vary from day to day depending on suite schedule.

I do not seem to have permission to access some data. Why and what can I do?

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means you do not have permission to access the latest forecast, i.e. those which are still valid. External users may need a licence agreement from their national meteorological service before they can access such data. Contact your Member State Computing Representative in such cases.

I cannot retrieve recent Initialised Analyses. Why?

Production of Initialised Analyses finished on 29/01/1996. After that date only Analysis is archived.

Why can't I find operational First Guess any more in the catalogue?

With the introduction of 12 hour 4d-Var on 12th September 2000, the data type First Guess has not been produced any longer on the operational deterministic model. That data is available as type Forecast from previous cycles and time step validating at First Guess time. The correspondence between First Guess and Forecast is as follows:

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That's correct. At the moment you need to specify other post-processing for packing to work.

What is the most efficient way to loop over several requests?

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If the reason to construct a loop around a MARS request is the desire to write the output to multiple target files try to use the multi-target feature whenever possible, see the next FAQ.

I cannot retrieve recent Initialised Analyses. Why?

Production of Initialised Analyses finished on 29/01/1996. After that date only Analysis is archived.

Why can't I find operational First Guess any more in the catalogue?

With the introduction of 12 hour 4d-Var on 12th September 2000, the data type First Guess has not been produced any longer on the operational deterministic model. That data is available as type Forecast from previous cycles and time step validating at First Guess time. The correspondence between First Guess and Forecast is as follows:

Parameter packing doesn't seem to have any effect if no other post-processing is carried out.

That's correct. At the moment you need to specify other post-processing for packing to work.

What is the best way to retrieve data to multiple target files?

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metview -e bufr [filename]

I cannot retrieve yesterday's observations. Why?

Observations are archived in MARS with 2 days delay. As a rule of thumb, you can always access date = -3, as the time at which observations archiving is carried out may vary from day to day depending on suite schedule. Please also note that observations are not generally accessible.