Charts
Radar/Chart Radar User Guide
12-10 65900010
Chart Update Error Messages
A list and explanation of chart update errors and messages that may be
generated in the Chart Update Summary table is given below.
To avoid update errors it is advisable to ensure the most up-to-date charts
are installed from the latest set of Base CDs, followed by the most recent
Update CD (this must be more recent than the Base CD). Once the
Base/Update installs are complete, view the charts in the Chart Update
Summary, sort by the Application Date, and check to see if any failures
occurred during the installation operation.
For information on installing charts from the SevenCs database (ENC
charts) refer to Chart Installation.
For information on installing C-Map charts, refer to Chapter 1 `
Chart
Installation’
in the VisionMaster FT Supplementary Features User Guide,
65900014.
Update Errors
1. Could not verify signature for file
Each ENC chart is delivered with a signature file that verifies the data
was created by a proper authority (official hydrographic office).
According to the IHO S-63 specification, the ECDIS must reject the
chart if a problem is encountered when verifying the signature. This
type of error can occur if the signature file was created incorrectly by
the chart producer. Also, if the wrong certificate file (IHO.CRT or
PRIMAR.CRT) is specified by the operator prior to chart import.
2. Application of update failed
This indicates the update could not be applied because it contains
invalid or inconsistent data. This error may be caused when data does
not comply with the chart validation rules in IHO S-58.
3. Could not decrypt file
This error occurs when the decryption of an encrypted ENC file fails.
The chart files contain validation mechanisms (e.g. checksum) to
ensure that the decryption is successful. If those validation
mechanisms fail, then the chart is rejected. This error may also occur if
the operator mistakenly selects
S-57 (unencrypted)
in the Sperry
Chart Installer for encrypted ENCs.
S-63
should be selected for AVCS /
Primar charts.
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