By Juliette Portala (Reuters) – Alstom’s shares slipped sharply on Wednesday, erasing earlier strong gains as the French train maker’s comments on cash flow generation and guidance divided the market. The stock climbed 9% after the market opened, before plummeting nearly 12%. By 1229 GMT, shares were down 9.8%. “There is a strongly bifurcated opinion on the mid-term prospects for Alstom, and specifically the group’s ability to generate cash and strengthen the capital structure,” Kepler Cheuvreux analyst William Mackie said. France’s high-speed TGV trains maker reported a positive free cash flo…