write a first post on dead link error

docs/source/blog/posts/dead-link-error.rst

+.. post:: 27 Oct, 2022
+    :tags: cookbook, usage
+    :category: How to
+    :author: Martin Lange
+    :excerpt: 2
+
+=============================
+Dead link error - what to do?
+=============================
+
+When setting up a FINAM composition, you may encounter the scheduler complaining ``Dead link detected between...``.
+This post explains what this means, and how to fix it.
+
+Cause of the error
+------------------
+
+The error means that you linked the output of a pull-based component (i.e. without time step) to something that needs push.
+This can be:
+
+#. A push-based component (i.e. without time step), via adapters or not
+#. A time-interpolating adapter
+
+The error message will also show where the problem is.
+
+In problem case 1:
+
+.. code-block:: text
+
+    Output >/> RegridLinear >/> Input
+
+Here, the problem is a push-based component on the right side.
+An example could be :class:`SimplexNoise <.modules.SimplexNoise>` as source, and a push-based plot of file writer as target.
+
+In problem case 2:
+
+.. code-block:: text
+
+    Output >/> LinearTime >> Input
+
+Here, the problem is a time-interpolating adapter along the link.
+An example could be :class:`SimplexNoise <.modules.SimplexNoise>` as source,
+and a :class:`LinearTime <.adapters.LinearTime>` adapter as shown in the above error message.
+
+Fixing the error
+----------------
+
+Push-based target problem
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The problem here is that both linked components have no time step, and none of them will initiate the exchange of data.
+
+The problem can be solved by putting another component with internal time step (i.e. a sub-class of :class:`.ITimeComponent`)
+between the two components. Exactly for this purpose, FINAM provides the :class:`TimeTrigger <.modules.TimeTrigger>` component.
+
+Time-interpolating adapter problem
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Most probably, this is a misconception of the coupling setup.
+As the source component has no internal time step, a time-interpolating adapter should not be required.
+
+In cases where the setup is intentional, the same solution as for the `Push-based target problem`_ applies.

docs/source/finam-book/cookbook/index.rst

@@ -2,7 +2,7 @@
 FINAM cookbook
 ==============
 
-A loose collection or recipes for solving tasks and problems frequently encountered when working with FINAM.
+A loose collection of recipes for solving tasks and problems frequently encountered when working with FINAM.
 
 .. postlist:: 25
    :format: {title}

docs/source/index.md

@@ -67,6 +67,8 @@ See our gallery of examples that use FINAM.
 
 ## News
 
+News from the [FINAM Blog](blog/index).
+
 ```{postlist} 25
 :format: "{title}"
 :tags: announcement