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https://www.entrust.com/sites/default/files/styles/image_640/public/2025-06/shield-lock-icon-white-solid.png" type="image/png" width="31"></source> <img alt="white shield with lock icon" loading="lazy" src="https://www.entrust.com/sites/default/files/2025-06/shield-lock-icon-white-solid.png" /> </picture> </div> </div> </div> </span> <span class="text">The Identity Thread</span> </a> </li> </ul> </div> </div> <div class="block block-system block-system-main-block no-title" id="block-mainpagecontent"> <div class="content block-content"> <article class="node node--type-knowledge-base node--promoted node--view-mode-full clearfix knowledge-base ent-section-w1280" data-history-node-id="57991"> <header> </header> <div class="node__content clearfix"> <div class="field field--name-body field--type-text-with-summary field--label-hidden field__item"><p><strong>Summary</strong></p><p>Failed to lock</p><hr/><table><tbody><tr><td><strong>Error Message no.</strong></td><td>151</td></tr><tr><td><strong>Message text</strong></td><td>Failed to lock</td></tr><tr><td><strong>Severity</strong></td><td>Critical</td></tr><tr><td><strong>Recovery Text</strong></td><td>An attempt to lock the printer failed. The card will be canceled. 1. Make sure that all access doors are closed securely. 2. Try locking the printer again.</td></tr></tbody></table></div> <div class="gavias-builder--content"></div> </div> </article> </div> </div> </div> </div> </div> </div> <!-- Sidebar Left --> <!-- End Sidebar Left --> <!-- Sidebar Right --> <!-- End Sidebar Right --> </div> </div> </div> </div> </div> </div> <footer class="footer" id="footer"> <div class="footer-inner"> <div class="footer-content"> <div class="region region__footer"> <div class="footer-main-wrapper has-form"> <div class="footer-form-wrapper"> <div class="block block-system block-system-menu-blockfooter no-title form-block" id="block-notech-subtheme-footer"> <div class="content block-content" id="form-block"> <div class="ent-section-w1280"> <div class="field field--name-field-title field--type-string field--label-hidden field__item">Stay Informed</div> <div class="field field--name-field-description field--type-text-long field--label-hidden field__item"><p>Sign up for <strong>The Identity Thread</strong> newsletter.</p></div> <form accept-charset="UTF-8" action="https://www.entrust.cn/knowledgebase/hardware/error-code-151-2" class="webform-submission-form webform-submission-add-form webform-submission-cybersecurity-institute-sub3-form webform-submission-cybersecurity-institute-sub3-add-form webform-submission-cybersecurity-institute-sub3-node-57991-form webform-submission-cybersecurity-institute-sub3-node-57991-add-form js-webform-submit-once js-webform-details-toggle webform-details-toggle email-ubc-validate" data-drupal-selector="webform-submission-cybersecurity-institute-sub3-node-57991-add-form" id="webform-submission-cybersecurity-institute-sub3-node-57991-add-form" method="post"> <div class="js-webform-type-email webform-type-email js-form-item form-item js-form-type-email form-item-emailaddress js-form-item-emailaddress"> <label class="sr-only js-form-required form-required" for="edit-emailaddress">Email Address</label> <input class="form-email required" data-drupal-selector="edit-emailaddress" id="edit-emailaddress" maxlength="254" name="emailaddress" placeholder="Enter your email" required="required" size="60" type="email" value=""/> </div> <div class="js-webform-type-processed-text webform-type-processed-text js-form-item form-item js-form-type-processed-text form-item- js-form-item- form-no-label" id="edit-consent-text"> <div style="font-size:10px;line-height:1.2em;margin-bottom:10px;margin-top:-10px;">By completing and submitting this form, you agree that Entrust may use the information provided to send you email communications. 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