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<?xml-stylesheet type="text/xsl" href="https://community.appian.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>about &amp;quot;a null parameter has been passed&amp;quot;</title><link>https://community.appian.com/discussions/f/new-to-appian/22290/about-a-null-parameter-has-been-passed</link><description>I make interfaces separately one by one, then combine them all together at final interface, the rule!input value is exactly as each of interface did. But the final combining interface always report &amp;quot; 
 
 
 
 
 
 
 Interface Definition: Expression evaluation</description><dc:language>en-US</dc:language><generator>Telligent Community 12</generator><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87280?ContentTypeID=1</link><pubDate>Tue, 26 Oct 2021 06:10:42 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:d437adf0-3d46-419b-80a1-fc9bfc548c97</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;I can&amp;#39;t help myself, but I really do not understand what you are talking about.&lt;/p&gt;
&lt;p&gt;I do not see your screen or code and I do not know what you are thinking about! I am repeating myself, but would you PLEASE try to follow this&lt;/p&gt;
&lt;p&gt;&lt;a href="https://codeblog.jonskeet.uk/2012/11/24/stack-overflow-question-checklist/"&gt;codeblog.jonskeet.uk/.../&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87276?ContentTypeID=1</link><pubDate>Tue, 26 Oct 2021 02:48:19 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:25e3f9b1-fcb1-45fe-9357-d64093314b4c</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;where is the castType example for boolean and number?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87275?ContentTypeID=1</link><pubDate>Tue, 26 Oct 2021 01:25:13 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:65e7201d-176e-46d1-91ca-39c47170fadd</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;Sir, if underneath level of rule input boolean pass into toper level of interface,but toper level of interface cannot have rule input&amp;nbsp;boolean value in order qualify to be published, then how can I do?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87259?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 13:08:32 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:3082f4df-d007-4887-8e1c-756c4d5a03c2</guid><dc:creator>Peter Lewis</dc:creator><description>&lt;p&gt;There should be no reason you can&amp;#39;t meet the functionality with local variables. If you need a local variable to be cast to a certain type, the local variable should support casting. I don&amp;#39;t follow the specific example you gave, maybe adding a code snippet would help?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87255?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 10:03:01 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:18a95c47-2e87-493d-a77f-7ff05248e405</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;I am confused. Are you saying that a local variable can not be of type boolean?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87254?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:56:32 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:42ac1d02-a77e-42dd-85a9-960bbf273d29</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;haha, if a rule input value as a cdt, then i can change to castType process by expression Rule. But if it is a boolean value need to be judged whether it is valid, if it is valid then true or false. Such value has no way to be saved in local variable right?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87253?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:54:07 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:762d3bce-b354-47a6-8765-96a8e11b561e</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;???&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87252?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:52:51 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:5a6d33ea-c7c8-440d-9f0a-0c0793393e1d</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;what if a judgement boolean value need to be processed in the interface? Since it can&amp;#39;t be avail by castType way?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87251?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:50:11 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:4c6c19c8-33b3-42b6-84e6-a07c094f8206</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;On a site, you can directly only use interfaces without any rule inputs. You either need to turn all your rule inputs into local variables or create a wrapper interface without any rule inputs. This wrapper then has a bunch of local variables you then pass to your main interface.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87250?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:43:07 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:a0eb8c32-8223-4237-821d-0e968a52dff8</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;I wish to publish my interface on site, but i can&amp;#39;t publish interface with too many rule inputs&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87249?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:42:05 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:618766a9-3b67-435a-98df-3ebd1d2faf38</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;I can not follow. Please elaborate.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87248?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:40:32 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:04c6c234-1588-46fc-9c11-42a02074beb8</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;btw,do you know how to publish a interface without rule inputs? I don&amp;#39;t know how to eliminate rule inputs to satisfy publish requirement&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87247?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:20:21 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:05a929db-2e34-4e80-9fde-4e65d2deeabd</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;Thank you so much, have a great day!&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87246?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:10:48 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:92ceeea9-2527-4dc9-9189-c3e22afb44e1</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;Because you pass a value in line 54 ?!?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87245?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:09:10 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:2519ec4f-fd2e-4f73-bb99-e4b92413b183</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;row of 373 returns correct value, but why 374 doesn&amp;#39;t since they almost same?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87244?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 09:01:53 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:ba5540d0-f715-40c9-8f2b-7a74626a379c</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;In line 47 of your first expression, I do not see a value for that rule input.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87243?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 08:59:41 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:ae729bd8-367e-498b-92ff-3a5827e6a57b</guid><dc:creator>immortalvirgil</dc:creator><description>&lt;p&gt;what is &amp;quot;do not pass a value to the rule input&amp;quot; mean?&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Since the row of 373 and row of 374 both return 0 items if put into expression rule for testing?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: about "a null parameter has been passed"</title><link>https://community.appian.com/thread/87242?ContentTypeID=1</link><pubDate>Mon, 25 Oct 2021 08:55:39 GMT</pubDate><guid isPermaLink="false">d3a83456-d57b-489c-a84c-4e8267bb592a:2b0c3da4-bf98-4464-88f1-20d3374442f9</guid><dc:creator>Stefan Helzle</dc:creator><description>&lt;p&gt;Sure. You do not pass a value to the rule input &amp;quot;cseservicecataloguephases&amp;quot;.&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>