{"action":"opened","issue":{"url":"https://api.github.com/repos/PHPOffice/PHPExcel/issues/875","repository_url":"https://api.github.com/repos/PHPOffice/PHPExcel","labels_url":"https://api.github.com/repos/PHPOffice/PHPExcel/issues/875/labels{/name}","comments_url":"https://api.github.com/repos/PHPOffice/PHPExcel/issues/875/comments","events_url":"https://api.github.com/repos/PHPOffice/PHPExcel/issues/875/events","html_url":"https://github.com/PHPOffice/PHPExcel/issues/875","id":146283559,"number":875,"title":"PHPExcel stops writing data after column IU","user":{"login":"tzfrs","id":3509557,"avatar_url":"https://avatars.githubusercontent.com/u/3509557?v=3","gravatar_id":"","url":"https://api.github.com/users/tzfrs","html_url":"https://github.com/tzfrs","followers_url":"https://api.github.com/users/tzfrs/followers","following_url":"https://api.github.com/users/tzfrs/following{/other_user}","gists_url":"https://api.github.com/users/tzfrs/gists{/gist_id}","starred_url":"https://api.github.com/users/tzfrs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tzfrs/subscriptions","organizations_url":"https://api.github.com/users/tzfrs/orgs","repos_url":"https://api.github.com/users/tzfrs/repos","events_url":"https://api.github.com/users/tzfrs/events{/privacy}","received_events_url":"https://api.github.com/users/tzfrs/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-04-06T11:30:56Z","updated_at":"2016-04-06T11:30:56Z","closed_at":null,"body":"Hello,\r\n\r\nI have a really, really big array. The array has 412 indexes. So, I'm writing data into 412 columns. The problem I'm having now, is that after the column `IU` the library stops writing data. I start writing at A1. And when I have a second array, to write into the next row, the data is also not there. So it seems like it's simply stopping.\r\n\r\nI also am merging. Merging, however works. I can merge until OW (don't need further merging, probably works until the end).\r\n\r\nWhat could be the problem here?\r\n\r\nHere is sample code to test\r\n\r\n```php \r\n$doc = new PHPExcel();\r\n\r\n$doc->setActiveSheetIndex(0);\r\n\r\n$test = [\r\n    [\r\n        '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35', '36', '37', '38', '39', '40', '41', '42', '43', '44', '45', '46', '47', '48', '49', '50', '51', '52', '53', '54', '55', '56', '57', '58', '59', '60', '61', '62', '63', '64', '65', '66', '67', '68', '69', '70', '71', '72', '73', '74', '75', '76', '77', '78', '79', '80', '81', '82', '83', '84', '85', '86', '87', '88', '89', '90', '91', '92', '93', '94', '95', '96', '97', '98', '99', '100', '101', '102', '103', '104', '105', '106', '107', '108', '109', '110', '111', '112', '113', '114', '115', '116', '117', '118', '119', '120', '121', '122', '123', '124', '125', '126', '127', '128', '129', '130', '131', '132', '133', '134', '135', '136', '137', '138', '139', '140', '141', '142', '143', '144', '145', '146', '147', '148', '149', '150', '151', '152', '153', '154', '155', '156', '157', '158', '159', '160', '161', '162', '163', '164', '165', '166', '167', '168', '169', '170', '171', '172', '173', '174', '175', '176', '177', '178', '179', '180', '181', '182', '183', '184', '185', '186', '187', '188', '189', '190', '191', '192', '193', '194', '195', '196', '197', '198', '199', '200', '201', '202', '203', '204', '205', '206', '207', '208', '209', '210', '211', '212', '213', '214', '215', '216', '217', '218', '219', '220', '221', '222', '223', '224', '225', '226', '227', '228', '229', '230', '231', '232', '233', '234', '235', '236', '237', '238', '239', '240', '241', '242', '243', '244', '245', '246', '247', '248', '249', '250', '251', '252', '253', '254', '255', '256', '257', '258', '259', '260', '261', '262', '263', '264', '265', '266', '267', '268', '269', '270', '271', '272', '273', '274', '275', '276', '277', '278', '279', '280', '281', '282', '283', '284', '285', '286', '287', '288', '289', '290', '291', '292', '293', '294', '295', '296', '297', '298', '299', '300', '301', '302', '303', '304', '305', '306', '307', '308', '309', '310', '311', '312', '313', '314', '315', '316', '317', '318', '319', '320', '321', '322', '323', '324', '325', '326', '327', '328', '329', '330', '331', '332', '333', '334', '335', '336', '337', '338', '339', '340', '341', '342', '343', '344', '345', '346', '347', '348', '349', '350', '351', '352', '353', '354', '355', '356', '357', '358', '359', '360', '361', '362', '363', '364', '365', '366', '367', '368', '369', '370', '371', '372', '373', '374', '375', '376', '377', '378', '379', '380', '381', '382', '383', '384', '385', '386', '387', '388', '389', '390', '391', '392', '393', '394', '395', '396', '397', '398', '399', '400', '401', '402', '403', '404', '405', '406', '407', '408', '409', '410', '411', '412',\r\n    ]\r\n];\r\n\r\n$doc->getActiveSheet()->fromArray($test, null, 'A1');\r\n```\r\n\r\nAs you can see, after 256 entries, the library just stops. seems like a bug?\r\n\r\nI can't tell you anything about the version, because in the `PHPExcel.php` the version text ist:\r\n\r\n`* @version    ##VERSION##, ##DATE##`\r\n"}}