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1 .. _troubleshooting:
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2
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3 Troubleshooting
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4 ===============
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5
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16
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6 As a general rule, when you encounter an issue, always make sure that
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7 you use the `most recent version
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8 <http://www.orthanc-server.com/download.php>`__ of Orthanc.
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9
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10 Also make a search on the `Orthanc Users discussion group
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11 <https://groups.google.com/forum/#!forum/orthanc-users>`__, and make a
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12 search in the present Orthanc Book (there is a search field at the top
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13 of this page). Your issue might indeed have already been discussed in
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14 the past or in the FAQ.
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15
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16
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17 Orthanc Explorer
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18 ----------------
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19
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20 * **I cannot login to Orthanc Explorer**: For security reasons, access
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21 to Orthanc from remote hosts is disabled by default. Only the
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22 localhost is allowed to access Orthanc. You have to set the
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23 ``RemoteAccessAllowed`` option in the :ref:`configuration file
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24 <configuration>` to ``true``. It is then strongly advised to set
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25 ``AuthenticationEnabled`` to ``true`` and to add a user to the
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26 ``RegisteredUsers`` option, also in the configuration file.
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16
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27
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28
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29 Performance issues
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30 ------------------
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31
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18
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32 * **Orthanc Explorer is slow under Windows on the localhost**:
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33
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34 - Favor ``127.0.0.1`` instead of ``localhost`` when specifying the
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35 network address of a server. Users have reported that this minor
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36 change `can massively improve performance
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37 <https://groups.google.com/d/msg/orthanc-users/tTe28zR0nGk/Lvs0STJLAgAJ>`__
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38 on Windows. Starting with Orthanc 1.0.1, the samples from the
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39 source distribution have been adapted in this way.
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40
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41 - As an alternative, you can disable IPv6 support. This is a
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42 Windows-specific problem that is discussed `here
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43 <http://superuser.com/questions/43823/google-chrome-is-slow-to-localhost>`__
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44 and `here
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45 <http://stackoverflow.com/questions/1726585/firefox-and-chrome-slow-on-localhost-known-fix-doesnt-work-on-windows-7>`__.
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46
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47 * If you experience **slow DICOM transfers under Linux**, please read
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48 the `following bug report
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49 <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=785400>`__. This
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50 issue does *not* affect all the versions of Linux. A
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51 patch to this issue is shipped with the Orthanc source code. In
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52 order to take advantage of this patch, you need to statically link
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53 Orthanc against DCMTK by using the ``-DUSE_SYSTEM_DCMTK=OFF`` flag
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54 `when invoking CMake
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55 <https://bitbucket.org/sjodogne/orthanc/src/default/LinuxCompilation.txt>`__.
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56
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57
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58 Windows-specific issues
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59 -----------------------
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60
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61 * Under Windows, Orthanc creates the "OrthancStorage" folder, and
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62 crashes with the error "**SQLite: Unable to open the database**":
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63 Your directory name is either too long, or it contains special
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64 characters. Please try and run Orthanc in a folder with a simple
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65 name such as ``C:\Orthanc``.
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