topic Custom read failed: Unknown error QlikviewSAP olapconnector in QlikView https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408468#M1229433 <HTML><HEAD></HEAD><BODY><P>Hello Everyone,</P><P></P><P>I am using SAP olap connector to pull the data from SAP BI. Whenever i pull more records(millions of rows) to store in qvd, i am getting this error&nbsp; "Custom read failed: Unknown error". But i am able to pull less data without any issue.</P><P></P><P>I try to implement the solutions mentioned in the forum like increasing timeoutfetch, using sleep etc., but it doesnt help. </P><P></P><P><IMG __jive_id="21863" height="324" onclick="" alt="qlikview error.JPG" src="/legacyfs/online/21863_qlikview error.JPG" width="557" /></P><P></P><P>Any Suggestions?</P><P></P><P>Kaviraj</P></BODY></HTML> Mon, 26 Jan 2026 21:26:37 GMT 2026-01-26T21:26:37Z Custom read failed: Unknown error QlikviewSAP olapconnector https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408468#M1229433 <HTML><HEAD></HEAD><BODY><P>Hello Everyone,</P><P></P><P>I am using SAP olap connector to pull the data from SAP BI. Whenever i pull more records(millions of rows) to store in qvd, i am getting this error&nbsp; "Custom read failed: Unknown error". But i am able to pull less data without any issue.</P><P></P><P>I try to implement the solutions mentioned in the forum like increasing timeoutfetch, using sleep etc., but it doesnt help. </P><P></P><P><IMG __jive_id="21863" height="324" onclick="" alt="qlikview error.JPG" src="/legacyfs/online/21863_qlikview error.JPG" width="557" /></P><P></P><P>Any Suggestions?</P><P></P><P>Kaviraj</P></BODY></HTML> Mon, 26 Jan 2026 21:26:37 GMT https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408468#M1229433 2026-01-26T21:26:37Z Re: Custom read failed: Unknown error QlikviewSAP olapconnector https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408469#M1229435 <HTML><HEAD></HEAD><BODY><P>I am encountering similar issue. Please help</P></BODY></HTML> Wed, 10 Oct 2012 13:56:52 GMT https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408469#M1229435 Qvmaster2019 2012-10-10T13:56:52Z Re: Custom read failed: Unknown error QlikviewSAP olapconnector https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408470#M1229439 <HTML><HEAD></HEAD><BODY><P>hi,</P><P></P><P>i had this error some times ago and it was a memory error. not enough ram.</P></BODY></HTML> Wed, 10 Oct 2012 14:27:02 GMT https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408470#M1229439 2012-10-10T14:27:02Z Re: Custom read failed: Unknown error QlikviewSAP olapconnector https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408471#M1229442 <HTML><HEAD></HEAD><BODY><P>How much ram are we talking about here? <IMG src="https://community.qlik.com/legacyfs/online/emoticons/grin.png" /></P></BODY></HTML> Wed, 10 Oct 2012 14:43:14 GMT https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408471#M1229442 Qvmaster2019 2012-10-10T14:43:14Z Re: Custom read failed: Unknown error QlikviewSAP olapconnector https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408472#M1229445 <HTML><HEAD></HEAD><BODY><P>in my case i have&nbsp; changed from 8 Gig to 48. but we are only at the beginning <span class="lia-unicode-emoji" title=":winking_face:">😉</span></P><P>i have whatched the memory usage during load, so i have found out that the server was writing to disk ...</P></BODY></HTML> Wed, 10 Oct 2012 14:46:25 GMT https://community.qlik.com/t5/QlikView/Custom-read-failed-Unknown-error-QlikviewSAP-olapconnector/m-p/408472#M1229445 2012-10-10T14:46:25Z