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Looks like -&gt;getIsInStock() was called on a NULL object.<br />
<br />
You'll just have to dig into your version of Magento + figure out how to fix this.<br />
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Likely, you had some SQL sequence of statements run outside a transaction, which was aborted... so you have partial data in your database which causes Magento to think there's an object to work on + then when the object instantiation occurs... the object can't really be created completely.<br />
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If you turn on debugging in Magento, then check your logs, likely you'll find clues about how to fix this.
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Looks like ->getIsInStock() was called on a NULL object.

You'll just have to dig into your version of Magento + figure out how to fix this.

Likely, you had some SQL sequence of statements run outside a transaction, which was aborted... so you have partial data in your database which causes Magento to think there's an object to work on + then when the object instantiation occurs... the object can't really be created completely.

If you turn on debugging in Magento, then check your logs, likely you'll find clues about how to fix this.

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Magento CE 1.9.3.3 having server 500 error on some product pages. The error message is:<br />

<pre><code id="code-10-29123346-1">Call to a member function getIsInStock() on null</code></pre>
<a href="https://filedb.experts-exchange.com/incoming/2018/10_w43/1396516/Screen-Shot-2018-10-25-at-2.32.10-AM.png" target="_blank" title="PHP fatal error (257 KB)"><img alt="PHP fatal error" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2018/10_w43/800_1396516/Screen-Shot-2018-10-25-at-2.32.10-AM.png" /></a><br />
Why it happened and how do I fix it?
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Screen-Shot-2018-10-25-at-2.32.10-AM.png

Magento CE 1.9.3.3 having server 500 error on some product pages. The error message is:
(CODE)


Why it happened and how do I fix it?

Magento getIsInStock error

Magento is an open-source e-commerce platform written in PHP for e-commerce web sites. Magento employs the MySQL/MariaDB relational database management system, the PHP programming language, and elements of the Zend Framework. It applies the conventions of object-oriented programming and model–view–controller architecture. Magento also uses the entity–attribute–value model to store data.

Magento

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.