https://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-differenceen-USTelligent Community 12https://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-differenceMon, 23 Jul 2018 14:28:01 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:414ff321-71a5-4ce9-ba3f-e00308dbb185Jordan Horwathttps://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-difference#commentsCurrent Revision posted to Appian Knowledge Base by Jordan Horwat on 7/23/2018 2:28:01 PM<br /> <h2>Symptoms</h2> <p>When applying the&nbsp;<code>difference()</code>&nbsp;function on an empty array, such as the following:</p> <pre class="code-java">=difference ({1,2,3,{},4},{})</pre> <p>the following error occurs:</p> <pre class="code-java">Expression evaluation error at function &#39;difference&#39;: Invalid types, can only act on data of the same type (<span class="code-object">Number</span> (<span class="code-object">Integer</span>), Any Type)</pre> <h2>Cause</h2> <p>This issue has been reported to the Appian product team. The reference number for this issue is <strong>AN-69761</strong>.</p> <h2>Action</h2> <p>As a workaround, place a check prior to the <code>difference()</code> function in order to avoid&nbsp;evaluating empty arrays.</p> <h2>Affected Versions</h2> <p>This article applies to all versions of Appian.</p> <p>Last Reviewed: May 2017</p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: known issues, expression rules, application design, open issues</div> https://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-difference/revision/2Fri, 26 May 2017 12:36:25 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:414ff321-71a5-4ce9-ba3f-e00308dbb185Nick Vigilantehttps://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-difference#commentsRevision 2 posted to Appian Knowledge Base by Nick Vigilante on 5/26/2017 12:36:25 PM<br /> <h2>Symptoms</h2> <p>When applying the&nbsp;<code>difference()</code>&nbsp;function on an empty array, such as the following:</p> <pre class="code-java">=difference ({1,2,3,{},4},{})</pre> <p>the following error occurs:</p> <pre class="code-java">Expression evaluation error at function &#39;difference&#39;: Invalid types, can only act on data of the same type (<span class="code-object">Number</span> (<span class="code-object">Integer</span>), Any Type)</pre> <h2>Cause</h2> <p>This issue has been reported to the Appian product team. The reference number for this issue is <strong>AN-69761</strong>.</p> <h2>Action</h2> <p>As a workaround, place a check prior to the <code>difference()</code> function in order to avoid&nbsp;evaluating empty arrays.</p> <h2>Affected Versions</h2> <p>This article applies to all versions of Appian.</p> <p>Last Reviewed: May 2017</p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: known issues, expression rules, open issues</div> https://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-difference/revision/1Thu, 25 May 2017 18:53:58 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:414ff321-71a5-4ce9-ba3f-e00308dbb185Jenn Pridemorehttps://community.appian.com/support/w/kb/602/kb-1365-cannot-use-empty-array-in-difference#commentsRevision 1 posted to Appian Knowledge Base by Jenn Pridemore on 5/25/2017 6:53:58 PM<br /> <h2>Symptoms</h2> <p>When applying the&nbsp;<code>difference()&nbsp;</code>function on an empty array, such as the following:</p> <pre class="code-java">=difference ({1,2,3,{},4},{})</pre> <p>the following error occurs:</p> <pre class="code-java">Expression evaluation error at function &#39;difference&#39;: Invalid types, can only act on data of the same type (<span class="code-object">Number</span> (<span class="code-object">Integer</span>), Any Type)</pre> <h2>Cause</h2> <p>This issue has been reported to the Appian product team. The reference number for this issue is AN-69761.</p> <h2>Action</h2> <p>As a workaround, place a check prior to the <code>difference()</code> function in order to avoid&nbsp;evaluating empty arrays.</p> <h2>Affected Versions</h2> <p>This article applies to Appian 7.8 and later.</p> <p>Last Reviewed: May 2017</p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: known issues, expression rules, open issues</div>