Fatal error: Uncaught exception 'Exception' with message ' in /var/www/b2b/system/library/db/mysqli.php on line 56

Exception: Error: Disk full (/tmp/#sql_3d2_3.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")<br />Error No: 1021<br />SELECT DISTINCT *, p.description AS name, d.name as nameov,
	(
	SELECT
		price
	FROM
		prices pd2
	WHERE
		pd2.stockid = p.stockid
		AND pd2.typeabbrev = 'A1'
		AND DATE(NOW()) BETWEEN pd2.startdate AND pd2.enddate
	LIMIT 1) AS price,
	(
	SELECT
		price
	FROM
		pricematrix ps
	WHERE
		ps.stockid = p.stockid
		AND ps.salestype = 'A1'
		AND (
			DATE(NOW()) BETWEEN ps.startdate AND ps.startdate
		)
	ORDER BY
		ps.price ASC
		LIMIT 1
	) AS special
FROM
	stockmaster p
LEFT JOIN product_description d on p.stockid = d.stockid
LEFT JOIN purchdata on p.stockid = purchdata.stockid
WHERE
	p.stockid = '0'

	 and discontinued <> 1  in /var/www/b2b/system/library/db/mysqli.php on line 56

Call Stack:
    0.0000     235744   1. {main}() /var/www/b2b/index.php:0
    0.0010     353248   2. start() /var/www/b2b/index.php:45
    0.0010     354832   3. require_once('/var/www/b2b/system/framework.php') /var/www/b2b/system/startup.php:130
    0.0090     539952   4. Front->dispatch() /var/www/b2b/system/framework.php:116
    0.0177     968632   5. Front->execute() /var/www/b2b/system/engine/front.php:28
    0.0177     968632   6. Action->execute() /var/www/b2b/system/engine/front.php:33
    0.0177     973424   7. call_user_func_array:{/var/www/b2b/system/engine/action.php:51}() /var/www/b2b/system/engine/action.php:51
    0.0177     973856   8. ControllerStartupRouter->index() /var/www/b2b/system/engine/action.php:51
    0.0179     974880   9. Action->execute() /var/www/b2b/catalog/controller/startup/router.php:36
    0.0179     981584  10. call_user_func_array:{/var/www/b2b/system/engine/action.php:51}() /var/www/b2b/system/engine/action.php:51
    0.0179     987664  11. ControllerProductProduct->index() /var/www/b2b/system/engine/action.php:51
    0.0215    1143672  12. Proxy->getProduct() /var/www/b2b/catalog/controller/product/product.php:183
    0.0215    1144024  13. Proxy->__call() /var/www/b2b/catalog/controller/product/product.php:183
    0.0215    1145160  14. call_user_func_array:{/var/www/b2b/system/engine/proxy.php:25}() /var/www/b2b/system/engine/proxy.php:25
    0.0215    1146336  15. Loader->{closure:/var/www/b2b/system/engine/loader.php:149-193}() /var/www/b2b/system/engine/proxy.php:25
    0.0216    1147928  16. call_user_func_array:{/var/www/b2b/system/engine/loader.php:180}() /var/www/b2b/system/engine/loader.php:180
    0.0216    1149376  17. ModelCatalogProduct->getProduct() /var/www/b2b/system/engine/loader.php:180
    0.0217    1151112  18. DB->query() /var/www/b2b/catalog/model/catalog/product.php:258
    0.0217    1151248  19. DB\MySQLi->query() /var/www/b2b/system/library/db.php:16