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Next: <a href="maxima_414.html#out-of-memory" accesskey="n" rel="next">out of memory</a>, Previous: <a href="maxima_412.html#Only-symbols-can-be-bound" accesskey="p" rel="previous">Only symbols can be bound</a>, Up: <a href="maxima_403.html#Error-Messages" accesskey="u" rel="up">Error Messages</a> [<a href="maxima_toc.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="maxima_423.html#Function-and-Variable-Index" title="Index" rel="index">Index</a>]</p>
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<a name="operators-of-arguments-must-all-be-the-same"></a>
<h4 class="subsection">97.1.10 operators of arguments must all be the same</h4>
<p>One possible reason for this error message to appear is a try to use <code><a href="maxima_21.html#append">append</a></code> in order
to add an equation to a list:
</p><div class="example">
<pre class="example">(%i1) l:[a=1,b=2,c=3];
(%o1) [a = 1, b = 2, c = 3]
</pre><pre class="example">(%i2) append(l,d=5);
append: operators of arguments must all be the same.
-- an error. To debug this try: debugmode(true);
</pre></div>
<p>In order to add an equation to a list it has to be wrapped in a
single-element list first:
</p><div class="example">
<pre class="example">(%i1) l:[a=1,b=2,c=3];
(%o1) [a = 1, b = 2, c = 3]
</pre><pre class="example">(%i2) append(l,[d=5]);
(%o2) [a = 1, b = 2, c = 3, d = 5]
</pre></div>
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