本人小白，aspen 换热器heatx模块 简捷计算没问题，调入edr出现错误如下： * warning shell&tube input file is not found for design mode. a new one will be created ***severe error specified stream pressure is equal to zero. flash calculations bypassed. ** error specified duty (1.6993813d+06) > cold side maximum (0.0000000d+00) block bypassed the following messages were issued during report generation: ** error specified stream pressure is equal to zero. flash calculations bypassed. properties will not be calculated due to flash failure。 求如何解决，研究好久了头都炸了，求老师大牛告知。
